Auto merge of #62542 - Centril:rollup-5mpb8tu, r=Centril

Rollup of 9 pull requests

Successful merges:

 - #62417 (Fix ICEs when `Self` is used in type aliases)
 - #62450 (Raise the default recursion limit to 128)
 - #62470 (Prevent shrinking of "crate select" element on Firefox)
 - #62515 (cli: make help output for -l and -L consistent)
 - #62520 (Regression test for issue 42574.)
 - #62526 (normalize use of backticks in compiler messages for libsyntax/feature_gate.rs)
 - #62527 (clarify that debug_assert does not completely omits the code)
 - #62535 (ci: Configure $CI_JOB_NAME correctly)
 - #62541 (Add spastorino for rustc-guide toolstate)

Failed merges:

r? @ghost

253 files changed, 1192 insertions, 756 deletions

diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 7f652c0d7a7..4d297fa918a 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -197,11 +197,11 @@ pub struct Compiler {
 
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
 pub enum DocTests {
-    // Default, run normal tests and doc tests.
+    /// Run normal tests and doc tests (default).
     Yes,
-    // Do not run any doc tests.
+    /// Do not run any doc tests.
     No,
-    // Only run doc tests.
+    /// Only run doc tests.
     Only,
 }
 
@@ -221,10 +221,10 @@ pub enum GitRepo {
 /// methods specifically on this structure itself (to make it easier to
 /// organize).
 pub struct Build {
-    // User-specified configuration via config.toml
+    /// User-specified configuration from `config.toml`.
     config: Config,
 
-    // Derived properties from the above two configurations
+    // Properties derived from the above configuration
     src: PathBuf,
     out: PathBuf,
     rust_info: channel::GitInfo,
@@ -240,12 +240,12 @@ pub struct Build {
     doc_tests: DocTests,
     verbosity: usize,
 
-    // Targets for which to build.
+    // Targets for which to build
     build: Interned<String>,
     hosts: Vec<Interned<String>>,
     targets: Vec<Interned<String>>,
 
-    // Stage 0 (downloaded) compiler and cargo or their local rust equivalents.
+    // Stage 0 (downloaded) compiler and cargo or their local rust equivalents
     initial_rustc: PathBuf,
     initial_cargo: PathBuf,
 
@@ -255,7 +255,7 @@ pub struct Build {
     cxx: HashMap<Interned<String>, cc::Tool>,
     ar: HashMap<Interned<String>, PathBuf>,
     ranlib: HashMap<Interned<String>, PathBuf>,
-    // Misc
+    // Miscellaneous
     crates: HashMap<Interned<String>, Crate>,
     is_sudo: bool,
     ci_env: CiEnv,
diff --git a/src/libcore/macros.rs b/src/libcore/macros.rs
index 58ea0207c56..2e999a0682b 100644
--- a/src/libcore/macros.rs
+++ b/src/libcore/macros.rs
@@ -145,11 +145,11 @@ macro_rules! assert_ne {
 /// # Uses
 ///
 /// Unlike [`assert!`], `debug_assert!` statements are only enabled in non
-/// optimized builds by default. An optimized build will omit all
+/// optimized builds by default. An optimized build will not execute
 /// `debug_assert!` statements unless `-C debug-assertions` is passed to the
 /// compiler. This makes `debug_assert!` useful for checks that are too
 /// expensive to be present in a release build but may be helpful during
-/// development.
+/// development. The result of expanding `debug_assert!` is always type checked.
 ///
 /// An unchecked assertion allows a program in an inconsistent state to keep
 /// running, which might have unexpected consequences but does not introduce
@@ -190,11 +190,11 @@ macro_rules! debug_assert {
 /// debug representations.
 ///
 /// Unlike [`assert_eq!`], `debug_assert_eq!` statements are only enabled in non
-/// optimized builds by default. An optimized build will omit all
+/// optimized builds by default. An optimized build will not execute
 /// `debug_assert_eq!` statements unless `-C debug-assertions` is passed to the
 /// compiler. This makes `debug_assert_eq!` useful for checks that are too
 /// expensive to be present in a release build but may be helpful during
-/// development.
+/// development. The result of expanding `debug_assert_eq!` is always type checked.
 ///
 /// [`assert_eq!`]: ../std/macro.assert_eq.html
 ///
@@ -217,11 +217,11 @@ macro_rules! debug_assert_eq {
 /// debug representations.
 ///
 /// Unlike [`assert_ne!`], `debug_assert_ne!` statements are only enabled in non
-/// optimized builds by default. An optimized build will omit all
+/// optimized builds by default. An optimized build will not execute
 /// `debug_assert_ne!` statements unless `-C debug-assertions` is passed to the
 /// compiler. This makes `debug_assert_ne!` useful for checks that are too
 /// expensive to be present in a release build but may be helpful during
-/// development.
+/// development. The result of expanding `debug_assert_ne!` is always type checked.
 ///
 /// [`assert_ne!`]: ../std/macro.assert_ne.html
 ///
diff --git a/src/librustc/middle/recursion_limit.rs b/src/librustc/middle/recursion_limit.rs
index 5f355d17072..4063fee04c4 100644
--- a/src/librustc/middle/recursion_limit.rs
+++ b/src/librustc/middle/recursion_limit.rs
@@ -12,7 +12,7 @@ use syntax::symbol::{Symbol, sym};
 use rustc_data_structures::sync::Once;
 
 pub fn update_limits(sess: &Session, krate: &ast::Crate) {
-    update_limit(krate, &sess.recursion_limit, sym::recursion_limit, 64);
+    update_limit(krate, &sess.recursion_limit, sym::recursion_limit, 128);
     update_limit(krate, &sess.type_length_limit, sym::type_length_limit, 1048576);
 }
 
diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs
index 82c53be3ec7..db8e2f64e30 100644
--- a/src/librustc/session/config.rs
+++ b/src/librustc/session/config.rs
@@ -1707,7 +1707,7 @@ pub fn rustc_short_optgroups() -> Vec<RustcOptGroup> {
             "",
             "Add a directory to the library search path. The
                              optional KIND can be one of dependency, crate, native,
-                             framework or all (the default).",
+                             framework, or all (the default).",
             "[KIND=]PATH",
         ),
         opt::multi_s(
@@ -1715,8 +1715,7 @@ pub fn rustc_short_optgroups() -> Vec<RustcOptGroup> {
             "",
             "Link the generated crate(s) to the specified native
                              library NAME. The optional KIND can be one of
-                             static, dylib, or framework. If omitted, dylib is
-                             assumed.",
+                             static, framework, or dylib (the default).",
             "[KIND=]NAME",
         ),
         opt::multi_s(
diff --git a/src/librustc_resolve/lib.rs b/src/librustc_resolve/lib.rs
index 66410482cc6..207b0b3754a 100644
--- a/src/librustc_resolve/lib.rs
+++ b/src/librustc_resolve/lib.rs
@@ -2523,17 +2523,7 @@ impl<'a> Resolver<'a> {
         debug!("(resolving item) resolving {} ({:?})", name, item.node);
 
         match item.node {
-            ItemKind::Ty(_, ref generics) => {
-                self.with_current_self_item(item, |this| {
-                    this.with_generic_param_rib(HasGenericParams(generics, ItemRibKind), |this| {
-                        let item_def_id = this.definitions.local_def_id(item.id);
-                        this.with_self_rib(Res::SelfTy(Some(item_def_id), None), |this| {
-                            visit::walk_item(this, item)
-                        })
-                    })
-                });
-            }
-
+            ItemKind::Ty(_, ref generics) |
             ItemKind::Existential(_, ref generics) |
             ItemKind::Fn(_, _, ref generics, _) => {
                 self.with_generic_param_rib(
diff --git a/src/librustc_typeck/check/mod.rs b/src/librustc_typeck/check/mod.rs
index e192465588e..4acba6d38fa 100644
--- a/src/librustc_typeck/check/mod.rs
+++ b/src/librustc_typeck/check/mod.rs
@@ -4458,7 +4458,7 @@ pub fn check_bounds_are_used<'tcx>(tcx: TyCtxt<'tcx>, generics: &ty::Generics, t
         return;
     }
 
-    // Make a vector of booleans initially false, set to true when used.
+    // Make a vector of booleans initially `false`; set to `true` when used.
     let mut types_used = vec![false; own_counts.types];
 
     for leaf_ty in ty.walk() {
@@ -4467,7 +4467,7 @@ pub fn check_bounds_are_used<'tcx>(tcx: TyCtxt<'tcx>, generics: &ty::Generics, t
             types_used[index as usize - own_counts.lifetimes] = true;
         } else if let ty::Error = leaf_ty.sty {
             // If there is already another error, do not emit
-            // an error for not using a type Parameter.
+            // an error for not using a type parameter.
             assert!(tcx.sess.has_errors());
             return;
         }
diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
index 59704dace4d..59d10668f11 100644
--- a/src/librustdoc/html/static/rustdoc.css
+++ b/src/librustdoc/html/static/rustdoc.css
@@ -639,6 +639,7 @@ a {
 	margin-top: 5px;
 	padding: 6px;
 	padding-right: 19px;
+	flex: none;
 	border: 0;
 	border-right: 0;
 	border-radius: 4px 0 0 4px;
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index fd1cb3d803b..84a012f03c9 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -1465,7 +1465,7 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
         cfg_fn!(dropck_eyepatch))),
     (sym::unwind, Whitelisted, template!(List: "allowed|aborts"), Gated(Stability::Unstable,
                                 sym::unwind_attributes,
-                                "#[unwind] is experimental",
+                                "`#[unwind]` is experimental",
                                 cfg_fn!(unwind_attributes))),
     (sym::used, Whitelisted, template!(Word), Ungated),
 
@@ -1551,13 +1551,13 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
 
     (sym::alloc_error_handler, Normal, template!(Word), Gated(Stability::Unstable,
                         sym::alloc_error_handler,
-                        "#[alloc_error_handler] is an unstable feature",
+                        "`#[alloc_error_handler]` is an unstable feature",
                         cfg_fn!(alloc_error_handler))),
 
     // RFC 2412
     (sym::optimize, Whitelisted, template!(List: "size|speed"), Gated(Stability::Unstable,
                             sym::optimize_attribute,
-                            "#[optimize] attribute is an unstable feature",
+                            "`#[optimize]` attribute is an unstable feature",
                             cfg_fn!(optimize_attribute))),
 
     // Crate level attributes
@@ -1674,7 +1674,7 @@ impl<'a> Context<'a> {
                 if let Some(content) = attr.meta_item_list() {
                     if content.iter().any(|c| c.check_name(sym::include)) {
                         gate_feature!(self, external_doc, attr.span,
-                            "#[doc(include = \"...\")] is experimental"
+                            "`#[doc(include = \"...\")]` is experimental"
                         );
                     }
                 }
@@ -1803,7 +1803,7 @@ fn leveled_feature_err<'a, S: Into<MultiSpan>>(
 
     // #23973: do not suggest `#![feature(...)]` if we are in beta/stable
     if sess.unstable_features.is_nightly_build() {
-        err.help(&format!("add #![feature({})] to the crate attributes to enable", feature));
+        err.help(&format!("add `#![feature({})]` to the crate attributes to enable", feature));
     }
 
     // If we're on stable and only emitting a "soft" warning, add a note to
@@ -1985,23 +1985,23 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
             if let Some(content) = attr.meta_item_list() {
                 if content.len() == 1 && content[0].check_name(sym::cfg) {
                     gate_feature_post!(&self, doc_cfg, attr.span,
-                        "#[doc(cfg(...))] is experimental"
+                        "`#[doc(cfg(...))]` is experimental"
                     );
                 } else if content.iter().any(|c| c.check_name(sym::masked)) {
                     gate_feature_post!(&self, doc_masked, attr.span,
-                        "#[doc(masked)] is experimental"
+                        "`#[doc(masked)]` is experimental"
                     );
                 } else if content.iter().any(|c| c.check_name(sym::spotlight)) {
                     gate_feature_post!(&self, doc_spotlight, attr.span,
-                        "#[doc(spotlight)] is experimental"
+                        "`#[doc(spotlight)]` is experimental"
                     );
                 } else if content.iter().any(|c| c.check_name(sym::alias)) {
                     gate_feature_post!(&self, doc_alias, attr.span,
-                        "#[doc(alias = \"...\")] is experimental"
+                        "`#[doc(alias = \"...\")]` is experimental"
                     );
                 } else if content.iter().any(|c| c.check_name(sym::keyword)) {
                     gate_feature_post!(&self, doc_keyword, attr.span,
-                        "#[doc(keyword = \"...\")] is experimental"
+                        "`#[doc(keyword = \"...\")]` is experimental"
                     );
                 }
             }
@@ -2044,13 +2044,13 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
                 }
                 if attr::contains_name(&i.attrs[..], sym::start) {
                     gate_feature_post!(&self, start, i.span,
-                                      "a #[start] function is an experimental \
+                                      "a `#[start]` function is an experimental \
                                        feature whose signature may change \
                                        over time");
                 }
                 if attr::contains_name(&i.attrs[..], sym::main) {
                     gate_feature_post!(&self, main, i.span,
-                                       "declaration of a nonstandard #[main] \
+                                       "declaration of a non-standard `#[main]` \
                                         function may change over time, for now \
                                         a top-level `fn main()` is required");
                 }
@@ -2638,7 +2638,7 @@ fn maybe_stage_features(span_handler: &Handler, krate: &ast::Crate,
             if attr.check_name(sym::feature) {
                 let release_channel = option_env!("CFG_RELEASE_CHANNEL").unwrap_or("(unknown)");
                 span_err!(span_handler, attr.span, E0554,
-                          "#![feature] may not be used on the {} release channel",
+                          "`#![feature]` may not be used on the {} release channel",
                           release_channel);
             }
         }
diff --git a/src/test/rustdoc/deep-structures.rs b/src/test/rustdoc/deep-structures.rs
new file mode 100644
index 00000000000..cd3b0d3ec97
--- /dev/null
+++ b/src/test/rustdoc/deep-structures.rs
@@ -0,0 +1,104 @@
+// This test verifies that we do not hit recursion limit trying to prove auto-trait bounds for
+// reasonably deep structures.
+
+#![crate_type="rlib"]
+
+pub struct A01(A02);
+pub struct A02(A03);
+pub struct A03(A04);
+pub struct A04(A05);
+pub struct A05(A06);
+pub struct A06(A07);
+pub struct A07(A08);
+pub struct A08(A09);
+pub struct A09(A10);
+pub struct A10(A11);
+pub struct A11(A12);
+pub struct A12(A13);
+pub struct A13(A14);
+pub struct A14(A15);
+pub struct A15(A16);
+pub struct A16(A17);
+pub struct A17(A18);
+pub struct A18(A19);
+pub struct A19(A20);
+pub struct A20(A21);
+pub struct A21(A22);
+pub struct A22(A23);
+pub struct A23(A24);
+pub struct A24(A25);
+pub struct A25(A26);
+pub struct A26(A27);
+pub struct A27(A28);
+pub struct A28(A29);
+pub struct A29(A30);
+pub struct A30(A31);
+pub struct A31(A32);
+pub struct A32(A33);
+pub struct A33(A34);
+pub struct A34(A35);
+pub struct A35(A36);
+pub struct A36(A37);
+pub struct A37(A38);
+pub struct A38(A39);
+pub struct A39(A40);
+pub struct A40(A41);
+pub struct A41(A42);
+pub struct A42(A43);
+pub struct A43(A44);
+pub struct A44(A45);
+pub struct A45(A46);
+pub struct A46(A47);
+pub struct A47(A48);
+pub struct A48(A49);
+pub struct A49(A50);
+pub struct A50(A51);
+pub struct A51(A52);
+pub struct A52(A53);
+pub struct A53(A54);
+pub struct A54(A55);
+pub struct A55(A56);
+pub struct A56(A57);
+pub struct A57(A58);
+pub struct A58(A59);
+pub struct A59(A60);
+pub struct A60(A61);
+pub struct A61(A62);
+pub struct A62(A63);
+pub struct A63(A64);
+pub struct A64(A65);
+pub struct A65(A66);
+pub struct A66(A67);
+pub struct A67(A68);
+pub struct A68(A69);
+pub struct A69(A70);
+pub struct A70(A71);
+pub struct A71(A72);
+pub struct A72(A73);
+pub struct A73(A74);
+pub struct A74(A75);
+pub struct A75(A76);
+pub struct A76(A77);
+pub struct A77(A78);
+pub struct A78(A79);
+pub struct A79(A80);
+pub struct A80(A81);
+pub struct A81(A82);
+pub struct A82(A83);
+pub struct A83(A84);
+pub struct A84(A85);
+pub struct A85(A86);
+pub struct A86(A87);
+pub struct A87(A88);
+pub struct A88(A89);
+pub struct A89(A90);
+pub struct A90(A91);
+pub struct A91(A92);
+pub struct A92(A93);
+pub struct A93(A94);
+pub struct A94(A95);
+pub struct A95(A96);
+pub struct A96(A97);
+pub struct A97(A98);
+pub struct A98(A99);
+pub struct A99;
diff --git a/src/test/ui-fulldeps/gated-plugin.stderr b/src/test/ui-fulldeps/gated-plugin.stderr
index 4f8bcda9020..c5c1326c4f3 100644
--- a/src/test/ui-fulldeps/gated-plugin.stderr
+++ b/src/test/ui-fulldeps/gated-plugin.stderr
@@ -5,7 +5,7 @@ LL | #![plugin(attr_plugin_test)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29597
-   = help: add #![feature(plugin)] to the crate attributes to enable
+   = help: add `#![feature(plugin)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui-fulldeps/hash-stable-is-unstable.stderr b/src/test/ui-fulldeps/hash-stable-is-unstable.stderr
index 2c1aa1f5d86..02056d30eae 100644
--- a/src/test/ui-fulldeps/hash-stable-is-unstable.stderr
+++ b/src/test/ui-fulldeps/hash-stable-is-unstable.stderr
@@ -9,7 +9,7 @@ LL | extern crate rustc_data_structures;
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
-   = help: add #![feature(rustc_private)] to the crate attributes to enable
+   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
   --> $DIR/hash-stable-is-unstable.rs:5:1
@@ -18,7 +18,7 @@ LL | extern crate rustc;
    | ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
-   = help: add #![feature(rustc_private)] to the crate attributes to enable
+   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
   --> $DIR/hash-stable-is-unstable.rs:7:1
@@ -27,7 +27,7 @@ LL | extern crate rustc_macros;
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
-   = help: add #![feature(rustc_private)] to the crate attributes to enable
+   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
   --> $DIR/hash-stable-is-unstable.rs:10:5
@@ -36,7 +36,7 @@ LL | use rustc_macros::HashStable;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
-   = help: add #![feature(rustc_private)] to the crate attributes to enable
+   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
   --> $DIR/hash-stable-is-unstable.rs:13:10
@@ -45,7 +45,7 @@ LL | #[derive(HashStable)]
    |          ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
-   = help: add #![feature(rustc_private)] to the crate attributes to enable
+   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
 
 error: aborting due to 6 previous errors
 
diff --git a/src/test/ui/async-await/feature-async-closure.stderr b/src/test/ui/async-await/feature-async-closure.stderr
index 61909f8659e..c3a8c921499 100644
--- a/src/test/ui/async-await/feature-async-closure.stderr
+++ b/src/test/ui/async-await/feature-async-closure.stderr
@@ -5,7 +5,7 @@ LL |     let _ = async || {};
    |             ^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/62290
-   = help: add #![feature(async_closure)] to the crate attributes to enable
+   = help: add `#![feature(async_closure)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/attributes/obsolete-attr.stderr b/src/test/ui/attributes/obsolete-attr.stderr
index 2ed7f87935f..6021700dfbb 100644
--- a/src/test/ui/attributes/obsolete-attr.stderr
+++ b/src/test/ui/attributes/obsolete-attr.stderr
@@ -5,7 +5,7 @@ LL | #[fixed_stack_segment] fn f() {}
    |   ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `ab_isize` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/obsolete-attr.rs:3:3
@@ -14,7 +14,7 @@ LL | #[ab_isize="stdcall"] extern {}
    |   ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/attributes/unknown-attr.stderr b/src/test/ui/attributes/unknown-attr.stderr
index d0ac58108fc..b46db566293 100644
--- a/src/test/ui/attributes/unknown-attr.stderr
+++ b/src/test/ui/attributes/unknown-attr.stderr
@@ -5,7 +5,7 @@ LL | #![mutable_doc]
    |    ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `dance` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/unknown-attr.rs:7:3
@@ -14,7 +14,7 @@ LL | #[dance] mod a {}
    |   ^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `dance` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/unknown-attr.rs:9:3
@@ -23,7 +23,7 @@ LL | #[dance] fn main() {}
    |   ^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/cast_char.rs b/src/test/ui/cast-char.rs
index 9634ed56f7b..9634ed56f7b 100644
--- a/src/test/ui/cast_char.rs
+++ b/src/test/ui/cast-char.rs
diff --git a/src/test/ui/cast_char.stderr b/src/test/ui/cast-char.stderr
index 37ef98bcb50..1729e5cbf09 100644
--- a/src/test/ui/cast_char.stderr
+++ b/src/test/ui/cast-char.stderr
@@ -1,17 +1,17 @@
 error: only `u8` can be cast into `char`
-  --> $DIR/cast_char.rs:4:23
+  --> $DIR/cast-char.rs:4:23
    |
 LL |     const XYZ: char = 0x1F888 as char;
    |                       ^^^^^^^^^^^^^^^ help: use a `char` literal instead: `'\u{1F888}'`
    |
 note: lint level defined here
-  --> $DIR/cast_char.rs:1:9
+  --> $DIR/cast-char.rs:1:9
    |
 LL | #![deny(overflowing_literals)]
    |         ^^^^^^^^^^^^^^^^^^^^
 
 error: only `u8` can be cast into `char`
-  --> $DIR/cast_char.rs:6:22
+  --> $DIR/cast-char.rs:6:22
    |
 LL |     const XY: char = 129160 as char;
    |                      ^^^^^^^^^^^^^^ help: use a `char` literal instead: `'\u{1F888}'`
diff --git a/src/test/ui/cast/cast-ptr-to-int-const.stderr b/src/test/ui/cast/cast-ptr-to-int-const.stderr
index c40accfd7c4..140661738d6 100644
--- a/src/test/ui/cast/cast-ptr-to-int-const.stderr
+++ b/src/test/ui/cast/cast-ptr-to-int-const.stderr
@@ -5,7 +5,7 @@ LL |         main as u32
    |         ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51910
-   = help: add #![feature(const_raw_ptr_to_usize_cast)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_to_usize_cast)]` to the crate attributes to enable
 
 error[E0658]: casting pointers to integers in constants is unstable
   --> $DIR/cast-ptr-to-int-const.rs:9:9
@@ -14,7 +14,7 @@ LL |         &Y as *const u32 as u32
    |         ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51910
-   = help: add #![feature(const_raw_ptr_to_usize_cast)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_to_usize_cast)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/conditional-compilation/cfg-attr-crate-2.stderr b/src/test/ui/conditional-compilation/cfg-attr-crate-2.stderr
index ec77789449a..5a70a5efc7f 100644
--- a/src/test/ui/conditional-compilation/cfg-attr-crate-2.stderr
+++ b/src/test/ui/conditional-compilation/cfg-attr-crate-2.stderr
@@ -5,7 +5,7 @@ LL | #![cfg_attr(broken, no_core)]
    |                     ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29639
-   = help: add #![feature(no_core)] to the crate attributes to enable
+   = help: add `#![feature(no_core)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/conditional-compilation/cfg-attr-multi-invalid-1.stderr b/src/test/ui/conditional-compilation/cfg-attr-multi-invalid-1.stderr
index ad5177dc9c0..5e9adf17807 100644
--- a/src/test/ui/conditional-compilation/cfg-attr-multi-invalid-1.stderr
+++ b/src/test/ui/conditional-compilation/cfg-attr-multi-invalid-1.stderr
@@ -5,7 +5,7 @@ LL | #![cfg_attr(broken, no_core, no_std)]
    |                     ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29639
-   = help: add #![feature(no_core)] to the crate attributes to enable
+   = help: add `#![feature(no_core)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/conditional-compilation/cfg-attr-multi-invalid-2.stderr b/src/test/ui/conditional-compilation/cfg-attr-multi-invalid-2.stderr
index 675997758e6..06b67156651 100644
--- a/src/test/ui/conditional-compilation/cfg-attr-multi-invalid-2.stderr
+++ b/src/test/ui/conditional-compilation/cfg-attr-multi-invalid-2.stderr
@@ -5,7 +5,7 @@ LL | #![cfg_attr(broken, no_std, no_core)]
    |                             ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29639
-   = help: add #![feature(no_core)] to the crate attributes to enable
+   = help: add `#![feature(no_core)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/conditional-compilation/cfg-attr-unknown-attribute-macro-expansion.stderr b/src/test/ui/conditional-compilation/cfg-attr-unknown-attribute-macro-expansion.stderr
index ca3e3d9eff1..cf4d0fc5ad0 100644
--- a/src/test/ui/conditional-compilation/cfg-attr-unknown-attribute-macro-expansion.stderr
+++ b/src/test/ui/conditional-compilation/cfg-attr-unknown-attribute-macro-expansion.stderr
@@ -8,7 +8,7 @@ LL | foo!();
    | ------- in this macro invocation
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/conditional-compilation/cfg-generic-params.stderr b/src/test/ui/conditional-compilation/cfg-generic-params.stderr
index 40ca44d9db5..b73d7da30b8 100644
--- a/src/test/ui/conditional-compilation/cfg-generic-params.stderr
+++ b/src/test/ui/conditional-compilation/cfg-generic-params.stderr
@@ -23,7 +23,7 @@ LL | fn f_lt_yes<#[cfg_attr(yes, unknown)] 'a>() {}
    |                             ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `unknown` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/cfg-generic-params.rs:21:29
@@ -32,7 +32,7 @@ LL | fn f_ty_yes<#[cfg_attr(yes, unknown)] T>() {}
    |                             ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `unknown` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/cfg-generic-params.rs:24:34
@@ -41,7 +41,7 @@ LL | type FnYes = for<#[cfg_attr(yes, unknown)] 'a> fn();
    |                                  ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `unknown` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/cfg-generic-params.rs:28:40
@@ -50,7 +50,7 @@ LL | type PolyYes = dyn for<#[cfg_attr(yes, unknown)] 'a> Copy;
    |                                        ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `unknown` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/cfg-generic-params.rs:32:43
@@ -59,7 +59,7 @@ LL | struct WhereYes where for<#[cfg_attr(yes, unknown)] 'a> u8: Copy;
    |                                           ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 8 previous errors
 
diff --git a/src/test/ui/const-generics/const-param-in-trait-ungated.stderr b/src/test/ui/const-generics/const-param-in-trait-ungated.stderr
index 53bc9738414..cfb1f8b581c 100644
--- a/src/test/ui/const-generics/const-param-in-trait-ungated.stderr
+++ b/src/test/ui/const-generics/const-param-in-trait-ungated.stderr
@@ -5,7 +5,7 @@ LL | trait Trait<const T: ()> {}
    |                   ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44580
-   = help: add #![feature(const_generics)] to the crate attributes to enable
+   = help: add `#![feature(const_generics)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/const-param-type-depends-on-type-param-ungated.stderr b/src/test/ui/const-generics/const-param-type-depends-on-type-param-ungated.stderr
index e3adbcfe602..c659074a091 100644
--- a/src/test/ui/const-generics/const-param-type-depends-on-type-param-ungated.stderr
+++ b/src/test/ui/const-generics/const-param-type-depends-on-type-param-ungated.stderr
@@ -11,7 +11,7 @@ LL | struct B<T, const N: T>(PhantomData<[T; N]>);
    |                   ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44580
-   = help: add #![feature(const_generics)] to the crate attributes to enable
+   = help: add `#![feature(const_generics)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/const-generics/issue-60263.stderr b/src/test/ui/const-generics/issue-60263.stderr
index ab1b9e4a7cd..fe7b6fdb190 100644
--- a/src/test/ui/const-generics/issue-60263.stderr
+++ b/src/test/ui/const-generics/issue-60263.stderr
@@ -5,7 +5,7 @@ LL | struct B<const I: u8>;
    |                ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44580
-   = help: add #![feature(const_generics)] to the crate attributes to enable
+   = help: add `#![feature(const_generics)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/consts/const-deref-ptr.stderr b/src/test/ui/consts/const-deref-ptr.stderr
index 23ac3b85ee6..6bfb9ee73e6 100644
--- a/src/test/ui/consts/const-deref-ptr.stderr
+++ b/src/test/ui/consts/const-deref-ptr.stderr
@@ -5,7 +5,7 @@ LL |     static C: u64 = unsafe {*(0xdeadbeef as *const u64)};
    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51911
-   = help: add #![feature(const_raw_ptr_deref)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_deref)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/consts/const-eval/feature-gate-const_fn_union.stderr b/src/test/ui/consts/const-eval/feature-gate-const_fn_union.stderr
index 069a8bfd4e7..5bf43cb8b6a 100644
--- a/src/test/ui/consts/const-eval/feature-gate-const_fn_union.stderr
+++ b/src/test/ui/consts/const-eval/feature-gate-const_fn_union.stderr
@@ -5,7 +5,7 @@ LL |     Foo { u }.i
    |     ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51909
-   = help: add #![feature(const_fn_union)] to the crate attributes to enable
+   = help: add `#![feature(const_fn_union)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/consts/const-eval/feature-gate-const_panic.stderr b/src/test/ui/consts/const-eval/feature-gate-const_panic.stderr
index 5d3e88e4e58..ac0ff7025d1 100644
--- a/src/test/ui/consts/const-eval/feature-gate-const_panic.stderr
+++ b/src/test/ui/consts/const-eval/feature-gate-const_panic.stderr
@@ -5,7 +5,7 @@ LL | const Z: () = panic!("cheese");
    |               ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51999
-   = help: add #![feature(const_panic)] to the crate attributes to enable
+   = help: add `#![feature(const_panic)]` to the crate attributes to enable
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error[E0658]: panicking in constants is unstable
@@ -15,7 +15,7 @@ LL | const X: () = unimplemented!();
    |               ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51999
-   = help: add #![feature(const_panic)] to the crate attributes to enable
+   = help: add `#![feature(const_panic)]` to the crate attributes to enable
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error[E0658]: panicking in constants is unstable
@@ -25,7 +25,7 @@ LL | const Y: () = unreachable!();
    |               ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51999
-   = help: add #![feature(const_panic)] to the crate attributes to enable
+   = help: add `#![feature(const_panic)]` to the crate attributes to enable
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error: aborting due to 3 previous errors
diff --git a/src/test/ui/consts/const-eval/match-test-ptr-null.stderr b/src/test/ui/consts/const-eval/match-test-ptr-null.stderr
index 167d5ad8d61..d8a3bac5ce6 100644
--- a/src/test/ui/consts/const-eval/match-test-ptr-null.stderr
+++ b/src/test/ui/consts/const-eval/match-test-ptr-null.stderr
@@ -5,7 +5,7 @@ LL |         match &1 as *const i32 as usize {
    |               ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51910
-   = help: add #![feature(const_raw_ptr_to_usize_cast)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_to_usize_cast)]` to the crate attributes to enable
 
 error[E0019]: constant contains unimplemented expression type
   --> $DIR/match-test-ptr-null.rs:6:15
diff --git a/src/test/ui/consts/min_const_fn/allow_const_fn_ptr_feature_gate.stderr b/src/test/ui/consts/min_const_fn/allow_const_fn_ptr_feature_gate.stderr
index d2ca0c8bc38..70a10d9a0c1 100644
--- a/src/test/ui/consts/min_const_fn/allow_const_fn_ptr_feature_gate.stderr
+++ b/src/test/ui/consts/min_const_fn/allow_const_fn_ptr_feature_gate.stderr
@@ -5,7 +5,7 @@ LL | #[rustc_allow_const_fn_ptr]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/consts/min_const_fn/min_const_fn_unsafe.stderr b/src/test/ui/consts/min_const_fn/min_const_fn_unsafe.stderr
index d1de5daa743..d3f2ece1f92 100644
--- a/src/test/ui/consts/min_const_fn/min_const_fn_unsafe.stderr
+++ b/src/test/ui/consts/min_const_fn/min_const_fn_unsafe.stderr
@@ -5,7 +5,7 @@ LL | const fn bad_const_fn_deref_raw(x: *mut usize) -> &'static usize { unsafe {
    |                                                                             ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51911
-   = help: add #![feature(const_raw_ptr_deref)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_deref)]` to the crate attributes to enable
 
 error[E0658]: dereferencing raw pointers in constant functions is unstable
   --> $DIR/min_const_fn_unsafe.rs:53:70
@@ -14,7 +14,7 @@ LL | const unsafe fn bad_const_unsafe_deref_raw(x: *mut usize) -> usize { *x }
    |                                                                      ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51911
-   = help: add #![feature(const_raw_ptr_deref)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_deref)]` to the crate attributes to enable
 
 error[E0658]: dereferencing raw pointers in constant functions is unstable
   --> $DIR/min_const_fn_unsafe.rs:56:83
@@ -23,7 +23,7 @@ LL | const unsafe fn bad_const_unsafe_deref_raw_ref(x: *mut usize) -> &'static u
    |                                                                                   ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51911
-   = help: add #![feature(const_raw_ptr_deref)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_deref)]` to the crate attributes to enable
 
 error[E0658]: unions in const fn are unstable
   --> $DIR/min_const_fn_unsafe.rs:63:5
@@ -32,7 +32,7 @@ LL |     Foo { x: () }.y
    |     ^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51909
-   = help: add #![feature(const_fn_union)] to the crate attributes to enable
+   = help: add `#![feature(const_fn_union)]` to the crate attributes to enable
 
 error[E0133]: dereference of raw pointer is unsafe and requires unsafe function or block
   --> $DIR/min_const_fn_unsafe.rs:50:77
diff --git a/src/test/ui/consts/projection_qualif.stderr b/src/test/ui/consts/projection_qualif.stderr
index c270296ac88..0c09f7ec52f 100644
--- a/src/test/ui/consts/projection_qualif.stderr
+++ b/src/test/ui/consts/projection_qualif.stderr
@@ -17,7 +17,7 @@ LL |         unsafe { *b = 5; }
    |                  ^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51911
-   = help: add #![feature(const_raw_ptr_deref)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_deref)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/custom_attribute.stderr b/src/test/ui/custom_attribute.stderr
index adb05e3fb2a..84c4e33e55a 100644
--- a/src/test/ui/custom_attribute.stderr
+++ b/src/test/ui/custom_attribute.stderr
@@ -5,7 +5,7 @@ LL | #[foo]
    |   ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `foo` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/custom_attribute.rs:5:7
@@ -14,7 +14,7 @@ LL |     #[foo]
    |       ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `foo` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/custom_attribute.rs:7:7
@@ -23,7 +23,7 @@ LL |     #[foo]
    |       ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/dropck/dropck_no_diverge_on_nonregular_1.stderr b/src/test/ui/dropck/dropck_no_diverge_on_nonregular_1.stderr
index 6e20dbaeddb..dd0c438f421 100644
--- a/src/test/ui/dropck/dropck_no_diverge_on_nonregular_1.stderr
+++ b/src/test/ui/dropck/dropck_no_diverge_on_nonregular_1.stderr
@@ -4,7 +4,7 @@ error[E0320]: overflow while adding drop-check rules for FingerTree<i32>
 LL |     let ft =
    |         ^^
    |
-   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
 error[E0320]: overflow while adding drop-check rules for FingerTree<i32>
   --> $DIR/dropck_no_diverge_on_nonregular_1.rs:25:9
@@ -12,7 +12,7 @@ error[E0320]: overflow while adding drop-check rules for FingerTree<i32>
 LL |         FingerTree::Single(1);
    |         ^^^^^^^^^^^^^^^^^^^^^
    |
-   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/dropck/dropck_no_diverge_on_nonregular_2.stderr b/src/test/ui/dropck/dropck_no_diverge_on_nonregular_2.stderr
index db652aea065..769d5aed664 100644
--- a/src/test/ui/dropck/dropck_no_diverge_on_nonregular_2.stderr
+++ b/src/test/ui/dropck/dropck_no_diverge_on_nonregular_2.stderr
@@ -4,7 +4,7 @@ error[E0320]: overflow while adding drop-check rules for FingerTree<i32>
 LL |     let ft =
    |         ^^
    |
-   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
 error[E0320]: overflow while adding drop-check rules for FingerTree<i32>
   --> $DIR/dropck_no_diverge_on_nonregular_2.rs:24:9
@@ -12,7 +12,7 @@ error[E0320]: overflow while adding drop-check rules for FingerTree<i32>
 LL |         FingerTree::Single(1);
    |         ^^^^^^^^^^^^^^^^^^^^^
    |
-   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/dropck/dropck_no_diverge_on_nonregular_3.stderr b/src/test/ui/dropck/dropck_no_diverge_on_nonregular_3.stderr
index a2425788e15..de8afdcc7cd 100644
--- a/src/test/ui/dropck/dropck_no_diverge_on_nonregular_3.stderr
+++ b/src/test/ui/dropck/dropck_no_diverge_on_nonregular_3.stderr
@@ -4,7 +4,7 @@ error[E0320]: overflow while adding drop-check rules for std::option::Option<Wra
 LL |     let w =
    |         ^
    |
-   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<u32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<u32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
 error[E0320]: overflow while adding drop-check rules for std::option::Option<Wrapper<u32>>
   --> $DIR/dropck_no_diverge_on_nonregular_3.rs:33:9
@@ -12,7 +12,7 @@ error[E0320]: overflow while adding drop-check rules for std::option::Option<Wra
 LL |         Some(Wrapper::Simple::<u32>);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<u32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<u32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
 error[E0320]: overflow while adding drop-check rules for Wrapper<u32>
   --> $DIR/dropck_no_diverge_on_nonregular_3.rs:33:14
@@ -20,7 +20,7 @@ error[E0320]: overflow while adding drop-check rules for Wrapper<u32>
 LL |         Some(Wrapper::Simple::<u32>);
    |              ^^^^^^^^^^^^^^^^^^^^^^
    |
-   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<u32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+   = note: overflowed on FingerTree<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<Node<u32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/enum-discriminant/feature-gate-arbitrary_enum_discriminant.stderr b/src/test/ui/enum-discriminant/feature-gate-arbitrary_enum_discriminant.stderr
index f50ed2c184d..afd7bda49fd 100644
--- a/src/test/ui/enum-discriminant/feature-gate-arbitrary_enum_discriminant.stderr
+++ b/src/test/ui/enum-discriminant/feature-gate-arbitrary_enum_discriminant.stderr
@@ -5,7 +5,7 @@ LL |   Tuple() = 2,
    |             ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60553
-   = help: add #![feature(arbitrary_enum_discriminant)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_enum_discriminant)]` to the crate attributes to enable
 
 error[E0658]: discriminants on non-unit variants are experimental
   --> $DIR/feature-gate-arbitrary_enum_discriminant.rs:8:14
@@ -14,7 +14,7 @@ LL |   Struct{} = 3,
    |              ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60553
-   = help: add #![feature(arbitrary_enum_discriminant)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_enum_discriminant)]` to the crate attributes to enable
 
 error[E0658]: custom discriminant values are not allowed in enums with tuple or struct variants
   --> $DIR/feature-gate-arbitrary_enum_discriminant.rs:4:10
@@ -29,7 +29,7 @@ LL |   Struct{} = 3,
    |   ------------ struct variant defined here
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60553
-   = help: add #![feature(arbitrary_enum_discriminant)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_enum_discriminant)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/error-codes/E0275.stderr b/src/test/ui/error-codes/E0275.stderr
index 01a923a53a2..40991cb2297 100644
--- a/src/test/ui/error-codes/E0275.stderr
+++ b/src/test/ui/error-codes/E0275.stderr
@@ -1,10 +1,74 @@
-error[E0275]: overflow evaluating the requirement `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>: Foo`
+error[E0275]: overflow evaluating the requirement `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>: Foo`
   --> $DIR/E0275.rs:5:1
    |
 LL | impl<T> Foo for T where Bar<T>: Foo {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
    = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
    = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
    = note: required because of the requirements on the impl of `Foo` for `Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<Bar<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
diff --git a/src/test/ui/error-codes/E0395.stderr b/src/test/ui/error-codes/E0395.stderr
index 30a4d4815ff..a4580f1cb23 100644
--- a/src/test/ui/error-codes/E0395.stderr
+++ b/src/test/ui/error-codes/E0395.stderr
@@ -5,7 +5,7 @@ LL | static BAZ: bool = unsafe { (&FOO as *const i32) == (&BAR as *const i32) };
    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53020
-   = help: add #![feature(const_compare_raw_pointers)] to the crate attributes to enable
+   = help: add `#![feature(const_compare_raw_pointers)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/error-codes/E0396.stderr b/src/test/ui/error-codes/E0396.stderr
index 6d2d121e91c..f0aa739a693 100644
--- a/src/test/ui/error-codes/E0396.stderr
+++ b/src/test/ui/error-codes/E0396.stderr
@@ -5,7 +5,7 @@ LL | const VALUE: u8 = unsafe { *REG_ADDR };
    |                            ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51911
-   = help: add #![feature(const_raw_ptr_deref)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_deref)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/error-codes/E0658.stderr b/src/test/ui/error-codes/E0658.stderr
index ff3f74addd2..071dbccd80b 100644
--- a/src/test/ui/error-codes/E0658.stderr
+++ b/src/test/ui/error-codes/E0658.stderr
@@ -7,7 +7,7 @@ LL | | }
    | |_^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/35118
-   = help: add #![feature(repr128)] to the crate attributes to enable
+   = help: add `#![feature(repr128)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/existential-type/issue-60371.stderr b/src/test/ui/existential-type/issue-60371.stderr
index 2560e01047a..6349b92f3e6 100644
--- a/src/test/ui/existential-type/issue-60371.stderr
+++ b/src/test/ui/existential-type/issue-60371.stderr
@@ -5,7 +5,7 @@ LL |     existential type Item: Bug;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/34511
-   = help: add #![feature(existential_type)] to the crate attributes to enable
+   = help: add `#![feature(existential_type)]` to the crate attributes to enable
 
 error[E0277]: the trait bound `(): Bug` is not satisfied
   --> $DIR/issue-60371.rs:8:5
diff --git a/src/test/ui/explore-issue-38412.stderr b/src/test/ui/explore-issue-38412.stderr
index ceeaaafc2bc..547874cefdd 100644
--- a/src/test/ui/explore-issue-38412.stderr
+++ b/src/test/ui/explore-issue-38412.stderr
@@ -5,7 +5,7 @@ LL |     let Record { a_stable_pub: _, a_unstable_declared_pub: _, a_unstable_un
    |                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38412
-   = help: add #![feature(unstable_undeclared)] to the crate attributes to enable
+   = help: add `#![feature(unstable_undeclared)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_undeclared'
   --> $DIR/explore-issue-38412.rs:30:5
@@ -14,7 +14,7 @@ LL |     r.a_unstable_undeclared_pub;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38412
-   = help: add #![feature(unstable_undeclared)] to the crate attributes to enable
+   = help: add `#![feature(unstable_undeclared)]` to the crate attributes to enable
 
 error[E0616]: field `b_crate` of struct `pub_and_stability::Record` is private
   --> $DIR/explore-issue-38412.rs:31:5
@@ -41,7 +41,7 @@ LL |     t.2;
    |     ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38412
-   = help: add #![feature(unstable_undeclared)] to the crate attributes to enable
+   = help: add `#![feature(unstable_undeclared)]` to the crate attributes to enable
 
 error[E0616]: field `3` of struct `pub_and_stability::Tuple` is private
   --> $DIR/explore-issue-38412.rs:38:5
@@ -68,7 +68,7 @@ LL |     r.unstable_undeclared_trait_method();
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38412
-   = help: add #![feature(unstable_undeclared)] to the crate attributes to enable
+   = help: add `#![feature(unstable_undeclared)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_undeclared'
   --> $DIR/explore-issue-38412.rs:48:7
@@ -77,7 +77,7 @@ LL |     r.unstable_undeclared();
    |       ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38412
-   = help: add #![feature(unstable_undeclared)] to the crate attributes to enable
+   = help: add `#![feature(unstable_undeclared)]` to the crate attributes to enable
 
 error[E0624]: method `pub_crate` is private
   --> $DIR/explore-issue-38412.rs:50:7
@@ -104,7 +104,7 @@ LL |     t.unstable_undeclared_trait_method();
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38412
-   = help: add #![feature(unstable_undeclared)] to the crate attributes to enable
+   = help: add `#![feature(unstable_undeclared)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_undeclared'
   --> $DIR/explore-issue-38412.rs:61:7
@@ -113,7 +113,7 @@ LL |     t.unstable_undeclared();
    |       ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38412
-   = help: add #![feature(unstable_undeclared)] to the crate attributes to enable
+   = help: add `#![feature(unstable_undeclared)]` to the crate attributes to enable
 
 error[E0624]: method `pub_crate` is private
   --> $DIR/explore-issue-38412.rs:63:7
diff --git a/src/test/ui/feature-gate-optimize_attribute.rs b/src/test/ui/feature-gate-optimize_attribute.rs
index f252a3c153d..7fc0fdde6fb 100644
--- a/src/test/ui/feature-gate-optimize_attribute.rs
+++ b/src/test/ui/feature-gate-optimize_attribute.rs
@@ -1,17 +1,17 @@
 #![crate_type="rlib"]
-#![optimize(speed)] //~ ERROR #[optimize] attribute is an unstable feature
+#![optimize(speed)] //~ ERROR `#[optimize]` attribute is an unstable feature
 
-#[optimize(size)] //~ ERROR #[optimize] attribute is an unstable feature
+#[optimize(size)] //~ ERROR `#[optimize]` attribute is an unstable feature
 mod module {
 
-#[optimize(size)] //~ ERROR #[optimize] attribute is an unstable feature
+#[optimize(size)] //~ ERROR `#[optimize]` attribute is an unstable feature
 fn size() {}
 
-#[optimize(speed)] //~ ERROR #[optimize] attribute is an unstable feature
+#[optimize(speed)] //~ ERROR `#[optimize]` attribute is an unstable feature
 fn speed() {}
 
 #[optimize(banana)]
-//~^ ERROR #[optimize] attribute is an unstable feature
+//~^ ERROR `#[optimize]` attribute is an unstable feature
 //~| ERROR E0722
 fn not_known() {}
 
diff --git a/src/test/ui/feature-gate-optimize_attribute.stderr b/src/test/ui/feature-gate-optimize_attribute.stderr
index 5e7c0a708c1..4ec512eaf39 100644
--- a/src/test/ui/feature-gate-optimize_attribute.stderr
+++ b/src/test/ui/feature-gate-optimize_attribute.stderr
@@ -1,47 +1,47 @@
-error[E0658]: #[optimize] attribute is an unstable feature
+error[E0658]: `#[optimize]` attribute is an unstable feature
   --> $DIR/feature-gate-optimize_attribute.rs:7:1
    |
 LL | #[optimize(size)]
    | ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54882
-   = help: add #![feature(optimize_attribute)] to the crate attributes to enable
+   = help: add `#![feature(optimize_attribute)]` to the crate attributes to enable
 
-error[E0658]: #[optimize] attribute is an unstable feature
+error[E0658]: `#[optimize]` attribute is an unstable feature
   --> $DIR/feature-gate-optimize_attribute.rs:10:1
    |
 LL | #[optimize(speed)]
    | ^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54882
-   = help: add #![feature(optimize_attribute)] to the crate attributes to enable
+   = help: add `#![feature(optimize_attribute)]` to the crate attributes to enable
 
-error[E0658]: #[optimize] attribute is an unstable feature
+error[E0658]: `#[optimize]` attribute is an unstable feature
   --> $DIR/feature-gate-optimize_attribute.rs:13:1
    |
 LL | #[optimize(banana)]
    | ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54882
-   = help: add #![feature(optimize_attribute)] to the crate attributes to enable
+   = help: add `#![feature(optimize_attribute)]` to the crate attributes to enable
 
-error[E0658]: #[optimize] attribute is an unstable feature
+error[E0658]: `#[optimize]` attribute is an unstable feature
   --> $DIR/feature-gate-optimize_attribute.rs:4:1
    |
 LL | #[optimize(size)]
    | ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54882
-   = help: add #![feature(optimize_attribute)] to the crate attributes to enable
+   = help: add `#![feature(optimize_attribute)]` to the crate attributes to enable
 
-error[E0658]: #[optimize] attribute is an unstable feature
+error[E0658]: `#[optimize]` attribute is an unstable feature
   --> $DIR/feature-gate-optimize_attribute.rs:2:1
    |
 LL | #![optimize(speed)]
    | ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54882
-   = help: add #![feature(optimize_attribute)] to the crate attributes to enable
+   = help: add `#![feature(optimize_attribute)]` to the crate attributes to enable
 
 error[E0722]: invalid argument
   --> $DIR/feature-gate-optimize_attribute.rs:13:12
diff --git a/src/test/ui/feature-gate/await-macro.stderr b/src/test/ui/feature-gate/await-macro.stderr
index 699a7a8886e..0d4f03e211b 100644
--- a/src/test/ui/feature-gate/await-macro.stderr
+++ b/src/test/ui/feature-gate/await-macro.stderr
@@ -5,7 +5,7 @@ LL |     await!(bar());
    |     ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/50547
-   = help: add #![feature(await_macro)] to the crate attributes to enable
+   = help: add `#![feature(await_macro)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gate/feature-gate-c_variadic.stderr b/src/test/ui/feature-gate/feature-gate-c_variadic.stderr
index 4367dee55a1..a446b105480 100644
--- a/src/test/ui/feature-gate/feature-gate-c_variadic.stderr
+++ b/src/test/ui/feature-gate/feature-gate-c_variadic.stderr
@@ -5,7 +5,7 @@ LL | pub unsafe extern "C" fn test(_: i32, ap: ...) { }
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44930
-   = help: add #![feature(c_variadic)] to the crate attributes to enable
+   = help: add `#![feature(c_variadic)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gate/feature-gate-cfg_doctest.stderr b/src/test/ui/feature-gate/feature-gate-cfg_doctest.stderr
index aa1d18a6f75..5ab45e01e50 100644
--- a/src/test/ui/feature-gate/feature-gate-cfg_doctest.stderr
+++ b/src/test/ui/feature-gate/feature-gate-cfg_doctest.stderr
@@ -5,7 +5,7 @@ LL | #[cfg(doctest)]
    |       ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/62210
-   = help: add #![feature(cfg_doctest)] to the crate attributes to enable
+   = help: add `#![feature(cfg_doctest)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gate/feature-gate-static-nobundle-2.stderr b/src/test/ui/feature-gate/feature-gate-static-nobundle-2.stderr
index 4a653265f16..059559dd928 100644
--- a/src/test/ui/feature-gate/feature-gate-static-nobundle-2.stderr
+++ b/src/test/ui/feature-gate/feature-gate-static-nobundle-2.stderr
@@ -1,7 +1,7 @@
 error[E0658]: kind="static-nobundle" is feature gated
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/37403
-   = help: add #![feature(static_nobundle)] to the crate attributes to enable
+   = help: add `#![feature(static_nobundle)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gate/issue-49983-see-issue-0.stderr b/src/test/ui/feature-gate/issue-49983-see-issue-0.stderr
index 83775322a27..adbbebd40c5 100644
--- a/src/test/ui/feature-gate/issue-49983-see-issue-0.stderr
+++ b/src/test/ui/feature-gate/issue-49983-see-issue-0.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'ptr_internals': use NonNull inste
 LL | #[allow(unused_imports)] use core::ptr::Unique;
    |                              ^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(ptr_internals)] to the crate attributes to enable
+   = help: add `#![feature(ptr_internals)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gated-feature-in-macro-arg.stderr b/src/test/ui/feature-gated-feature-in-macro-arg.stderr
index 5cbd1023b3c..5ee05154c3a 100644
--- a/src/test/ui/feature-gated-feature-in-macro-arg.stderr
+++ b/src/test/ui/feature-gated-feature-in-macro-arg.stderr
@@ -6,7 +6,7 @@ LL | |             fn atomic_fence();
 LL | |         }
    | |_________^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-abi-msp430-interrupt.stderr b/src/test/ui/feature-gates/feature-gate-abi-msp430-interrupt.stderr
index 0eb26ec8291..0d2e355535d 100644
--- a/src/test/ui/feature-gates/feature-gate-abi-msp430-interrupt.stderr
+++ b/src/test/ui/feature-gates/feature-gate-abi-msp430-interrupt.stderr
@@ -5,7 +5,7 @@ LL | extern "msp430-interrupt" fn foo() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38487
-   = help: add #![feature(abi_msp430_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_msp430_interrupt)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-abi.stderr b/src/test/ui/feature-gates/feature-gate-abi.stderr
index e20ab0cb2f5..88e0b8667be 100644
--- a/src/test/ui/feature-gates/feature-gate-abi.stderr
+++ b/src/test/ui/feature-gates/feature-gate-abi.stderr
@@ -4,7 +4,7 @@ error[E0658]: intrinsics are subject to change
 LL | extern "rust-intrinsic" fn f1() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error[E0658]: platform intrinsics are experimental and possibly buggy
   --> $DIR/feature-gate-abi.rs:13:1
@@ -13,7 +13,7 @@ LL | extern "platform-intrinsic" fn f2() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(platform_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(platform_intrinsics)]` to the crate attributes to enable
 
 error[E0658]: vectorcall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:14:1
@@ -21,7 +21,7 @@ error[E0658]: vectorcall is experimental and subject to change
 LL | extern "vectorcall" fn f3() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_vectorcall)] to the crate attributes to enable
+   = help: add `#![feature(abi_vectorcall)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-abi.rs:15:1
@@ -30,7 +30,7 @@ LL | extern "rust-call" fn f4() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: msp430-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:16:1
@@ -39,7 +39,7 @@ LL | extern "msp430-interrupt" fn f5() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38487
-   = help: add #![feature(abi_msp430_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_msp430_interrupt)]` to the crate attributes to enable
 
 error[E0658]: PTX ABIs are experimental and subject to change
   --> $DIR/feature-gate-abi.rs:17:1
@@ -48,7 +48,7 @@ LL | extern "ptx-kernel" fn f6() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38788
-   = help: add #![feature(abi_ptx)] to the crate attributes to enable
+   = help: add `#![feature(abi_ptx)]` to the crate attributes to enable
 
 error[E0658]: x86-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:18:1
@@ -57,7 +57,7 @@ LL | extern "x86-interrupt" fn f7() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/40180
-   = help: add #![feature(abi_x86_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_x86_interrupt)]` to the crate attributes to enable
 
 error[E0658]: thiscall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:19:1
@@ -65,7 +65,7 @@ error[E0658]: thiscall is experimental and subject to change
 LL | extern "thiscall" fn f8() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_thiscall)] to the crate attributes to enable
+   = help: add `#![feature(abi_thiscall)]` to the crate attributes to enable
 
 error[E0658]: amdgpu-kernel ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:20:1
@@ -74,7 +74,7 @@ LL | extern "amdgpu-kernel" fn f9() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51575
-   = help: add #![feature(abi_amdgpu_kernel)] to the crate attributes to enable
+   = help: add `#![feature(abi_amdgpu_kernel)]` to the crate attributes to enable
 
 error[E0658]: intrinsics are subject to change
   --> $DIR/feature-gate-abi.rs:24:5
@@ -82,7 +82,7 @@ error[E0658]: intrinsics are subject to change
 LL |     extern "rust-intrinsic" fn m1();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error[E0658]: platform intrinsics are experimental and possibly buggy
   --> $DIR/feature-gate-abi.rs:25:5
@@ -91,7 +91,7 @@ LL |     extern "platform-intrinsic" fn m2();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(platform_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(platform_intrinsics)]` to the crate attributes to enable
 
 error[E0658]: vectorcall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:26:5
@@ -99,7 +99,7 @@ error[E0658]: vectorcall is experimental and subject to change
 LL |     extern "vectorcall" fn m3();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_vectorcall)] to the crate attributes to enable
+   = help: add `#![feature(abi_vectorcall)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-abi.rs:27:5
@@ -108,7 +108,7 @@ LL |     extern "rust-call" fn m4();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: msp430-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:28:5
@@ -117,7 +117,7 @@ LL |     extern "msp430-interrupt" fn m5();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38487
-   = help: add #![feature(abi_msp430_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_msp430_interrupt)]` to the crate attributes to enable
 
 error[E0658]: PTX ABIs are experimental and subject to change
   --> $DIR/feature-gate-abi.rs:29:5
@@ -126,7 +126,7 @@ LL |     extern "ptx-kernel" fn m6();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38788
-   = help: add #![feature(abi_ptx)] to the crate attributes to enable
+   = help: add `#![feature(abi_ptx)]` to the crate attributes to enable
 
 error[E0658]: x86-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:30:5
@@ -135,7 +135,7 @@ LL |     extern "x86-interrupt" fn m7();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/40180
-   = help: add #![feature(abi_x86_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_x86_interrupt)]` to the crate attributes to enable
 
 error[E0658]: thiscall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:31:5
@@ -143,7 +143,7 @@ error[E0658]: thiscall is experimental and subject to change
 LL |     extern "thiscall" fn m8();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_thiscall)] to the crate attributes to enable
+   = help: add `#![feature(abi_thiscall)]` to the crate attributes to enable
 
 error[E0658]: amdgpu-kernel ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:32:5
@@ -152,7 +152,7 @@ LL |     extern "amdgpu-kernel" fn m9();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51575
-   = help: add #![feature(abi_amdgpu_kernel)] to the crate attributes to enable
+   = help: add `#![feature(abi_amdgpu_kernel)]` to the crate attributes to enable
 
 error[E0658]: intrinsics are subject to change
   --> $DIR/feature-gate-abi.rs:34:5
@@ -160,7 +160,7 @@ error[E0658]: intrinsics are subject to change
 LL |     extern "rust-intrinsic" fn dm1() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error[E0658]: platform intrinsics are experimental and possibly buggy
   --> $DIR/feature-gate-abi.rs:35:5
@@ -169,7 +169,7 @@ LL |     extern "platform-intrinsic" fn dm2() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(platform_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(platform_intrinsics)]` to the crate attributes to enable
 
 error[E0658]: vectorcall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:36:5
@@ -177,7 +177,7 @@ error[E0658]: vectorcall is experimental and subject to change
 LL |     extern "vectorcall" fn dm3() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_vectorcall)] to the crate attributes to enable
+   = help: add `#![feature(abi_vectorcall)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-abi.rs:37:5
@@ -186,7 +186,7 @@ LL |     extern "rust-call" fn dm4() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: msp430-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:38:5
@@ -195,7 +195,7 @@ LL |     extern "msp430-interrupt" fn dm5() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38487
-   = help: add #![feature(abi_msp430_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_msp430_interrupt)]` to the crate attributes to enable
 
 error[E0658]: PTX ABIs are experimental and subject to change
   --> $DIR/feature-gate-abi.rs:39:5
@@ -204,7 +204,7 @@ LL |     extern "ptx-kernel" fn dm6() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38788
-   = help: add #![feature(abi_ptx)] to the crate attributes to enable
+   = help: add `#![feature(abi_ptx)]` to the crate attributes to enable
 
 error[E0658]: x86-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:40:5
@@ -213,7 +213,7 @@ LL |     extern "x86-interrupt" fn dm7() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/40180
-   = help: add #![feature(abi_x86_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_x86_interrupt)]` to the crate attributes to enable
 
 error[E0658]: thiscall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:41:5
@@ -221,7 +221,7 @@ error[E0658]: thiscall is experimental and subject to change
 LL |     extern "thiscall" fn dm8() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_thiscall)] to the crate attributes to enable
+   = help: add `#![feature(abi_thiscall)]` to the crate attributes to enable
 
 error[E0658]: amdgpu-kernel ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:42:5
@@ -230,7 +230,7 @@ LL |     extern "amdgpu-kernel" fn dm9() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51575
-   = help: add #![feature(abi_amdgpu_kernel)] to the crate attributes to enable
+   = help: add `#![feature(abi_amdgpu_kernel)]` to the crate attributes to enable
 
 error[E0658]: intrinsics are subject to change
   --> $DIR/feature-gate-abi.rs:49:5
@@ -238,7 +238,7 @@ error[E0658]: intrinsics are subject to change
 LL |     extern "rust-intrinsic" fn m1() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error[E0658]: platform intrinsics are experimental and possibly buggy
   --> $DIR/feature-gate-abi.rs:50:5
@@ -247,7 +247,7 @@ LL |     extern "platform-intrinsic" fn m2() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(platform_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(platform_intrinsics)]` to the crate attributes to enable
 
 error[E0658]: vectorcall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:51:5
@@ -255,7 +255,7 @@ error[E0658]: vectorcall is experimental and subject to change
 LL |     extern "vectorcall" fn m3() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_vectorcall)] to the crate attributes to enable
+   = help: add `#![feature(abi_vectorcall)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-abi.rs:52:5
@@ -264,7 +264,7 @@ LL |     extern "rust-call" fn m4() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: msp430-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:53:5
@@ -273,7 +273,7 @@ LL |     extern "msp430-interrupt" fn m5() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38487
-   = help: add #![feature(abi_msp430_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_msp430_interrupt)]` to the crate attributes to enable
 
 error[E0658]: PTX ABIs are experimental and subject to change
   --> $DIR/feature-gate-abi.rs:54:5
@@ -282,7 +282,7 @@ LL |     extern "ptx-kernel" fn m6() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38788
-   = help: add #![feature(abi_ptx)] to the crate attributes to enable
+   = help: add `#![feature(abi_ptx)]` to the crate attributes to enable
 
 error[E0658]: x86-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:55:5
@@ -291,7 +291,7 @@ LL |     extern "x86-interrupt" fn m7() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/40180
-   = help: add #![feature(abi_x86_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_x86_interrupt)]` to the crate attributes to enable
 
 error[E0658]: thiscall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:56:5
@@ -299,7 +299,7 @@ error[E0658]: thiscall is experimental and subject to change
 LL |     extern "thiscall" fn m8() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_thiscall)] to the crate attributes to enable
+   = help: add `#![feature(abi_thiscall)]` to the crate attributes to enable
 
 error[E0658]: amdgpu-kernel ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:57:5
@@ -308,7 +308,7 @@ LL |     extern "amdgpu-kernel" fn m9() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51575
-   = help: add #![feature(abi_amdgpu_kernel)] to the crate attributes to enable
+   = help: add `#![feature(abi_amdgpu_kernel)]` to the crate attributes to enable
 
 error[E0658]: intrinsics are subject to change
   --> $DIR/feature-gate-abi.rs:62:5
@@ -316,7 +316,7 @@ error[E0658]: intrinsics are subject to change
 LL |     extern "rust-intrinsic" fn im1() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error[E0658]: platform intrinsics are experimental and possibly buggy
   --> $DIR/feature-gate-abi.rs:63:5
@@ -325,7 +325,7 @@ LL |     extern "platform-intrinsic" fn im2() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(platform_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(platform_intrinsics)]` to the crate attributes to enable
 
 error[E0658]: vectorcall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:64:5
@@ -333,7 +333,7 @@ error[E0658]: vectorcall is experimental and subject to change
 LL |     extern "vectorcall" fn im3() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_vectorcall)] to the crate attributes to enable
+   = help: add `#![feature(abi_vectorcall)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-abi.rs:65:5
@@ -342,7 +342,7 @@ LL |     extern "rust-call" fn im4() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: msp430-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:66:5
@@ -351,7 +351,7 @@ LL |     extern "msp430-interrupt" fn im5() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38487
-   = help: add #![feature(abi_msp430_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_msp430_interrupt)]` to the crate attributes to enable
 
 error[E0658]: PTX ABIs are experimental and subject to change
   --> $DIR/feature-gate-abi.rs:67:5
@@ -360,7 +360,7 @@ LL |     extern "ptx-kernel" fn im6() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38788
-   = help: add #![feature(abi_ptx)] to the crate attributes to enable
+   = help: add `#![feature(abi_ptx)]` to the crate attributes to enable
 
 error[E0658]: x86-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:68:5
@@ -369,7 +369,7 @@ LL |     extern "x86-interrupt" fn im7() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/40180
-   = help: add #![feature(abi_x86_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_x86_interrupt)]` to the crate attributes to enable
 
 error[E0658]: thiscall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:69:5
@@ -377,7 +377,7 @@ error[E0658]: thiscall is experimental and subject to change
 LL |     extern "thiscall" fn im8() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_thiscall)] to the crate attributes to enable
+   = help: add `#![feature(abi_thiscall)]` to the crate attributes to enable
 
 error[E0658]: amdgpu-kernel ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:70:5
@@ -386,7 +386,7 @@ LL |     extern "amdgpu-kernel" fn im9() {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51575
-   = help: add #![feature(abi_amdgpu_kernel)] to the crate attributes to enable
+   = help: add `#![feature(abi_amdgpu_kernel)]` to the crate attributes to enable
 
 error[E0658]: intrinsics are subject to change
   --> $DIR/feature-gate-abi.rs:74:11
@@ -394,7 +394,7 @@ error[E0658]: intrinsics are subject to change
 LL | type A1 = extern "rust-intrinsic" fn();
    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error[E0658]: platform intrinsics are experimental and possibly buggy
   --> $DIR/feature-gate-abi.rs:75:11
@@ -403,7 +403,7 @@ LL | type A2 = extern "platform-intrinsic" fn();
    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(platform_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(platform_intrinsics)]` to the crate attributes to enable
 
 error[E0658]: vectorcall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:76:11
@@ -411,7 +411,7 @@ error[E0658]: vectorcall is experimental and subject to change
 LL | type A3 = extern "vectorcall" fn();
    |           ^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_vectorcall)] to the crate attributes to enable
+   = help: add `#![feature(abi_vectorcall)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-abi.rs:77:11
@@ -420,7 +420,7 @@ LL | type A4 = extern "rust-call" fn();
    |           ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: msp430-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:78:11
@@ -429,7 +429,7 @@ LL | type A5 = extern "msp430-interrupt" fn();
    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38487
-   = help: add #![feature(abi_msp430_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_msp430_interrupt)]` to the crate attributes to enable
 
 error[E0658]: PTX ABIs are experimental and subject to change
   --> $DIR/feature-gate-abi.rs:79:11
@@ -438,7 +438,7 @@ LL | type A6 = extern "ptx-kernel" fn ();
    |           ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38788
-   = help: add #![feature(abi_ptx)] to the crate attributes to enable
+   = help: add `#![feature(abi_ptx)]` to the crate attributes to enable
 
 error[E0658]: x86-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:80:11
@@ -447,7 +447,7 @@ LL | type A7 = extern "x86-interrupt" fn();
    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/40180
-   = help: add #![feature(abi_x86_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_x86_interrupt)]` to the crate attributes to enable
 
 error[E0658]: thiscall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:81:11
@@ -455,7 +455,7 @@ error[E0658]: thiscall is experimental and subject to change
 LL | type A8 = extern "thiscall" fn();
    |           ^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_thiscall)] to the crate attributes to enable
+   = help: add `#![feature(abi_thiscall)]` to the crate attributes to enable
 
 error[E0658]: amdgpu-kernel ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:82:11
@@ -464,7 +464,7 @@ LL | type A9 = extern "amdgpu-kernel" fn();
    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51575
-   = help: add #![feature(abi_amdgpu_kernel)] to the crate attributes to enable
+   = help: add `#![feature(abi_amdgpu_kernel)]` to the crate attributes to enable
 
 error[E0658]: intrinsics are subject to change
   --> $DIR/feature-gate-abi.rs:85:1
@@ -472,7 +472,7 @@ error[E0658]: intrinsics are subject to change
 LL | extern "rust-intrinsic" {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error[E0658]: platform intrinsics are experimental and possibly buggy
   --> $DIR/feature-gate-abi.rs:86:1
@@ -481,7 +481,7 @@ LL | extern "platform-intrinsic" {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(platform_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(platform_intrinsics)]` to the crate attributes to enable
 
 error[E0658]: vectorcall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:87:1
@@ -489,7 +489,7 @@ error[E0658]: vectorcall is experimental and subject to change
 LL | extern "vectorcall" {}
    | ^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_vectorcall)] to the crate attributes to enable
+   = help: add `#![feature(abi_vectorcall)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-abi.rs:88:1
@@ -498,7 +498,7 @@ LL | extern "rust-call" {}
    | ^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: msp430-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:89:1
@@ -507,7 +507,7 @@ LL | extern "msp430-interrupt" {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38487
-   = help: add #![feature(abi_msp430_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_msp430_interrupt)]` to the crate attributes to enable
 
 error[E0658]: PTX ABIs are experimental and subject to change
   --> $DIR/feature-gate-abi.rs:90:1
@@ -516,7 +516,7 @@ LL | extern "ptx-kernel" {}
    | ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/38788
-   = help: add #![feature(abi_ptx)] to the crate attributes to enable
+   = help: add `#![feature(abi_ptx)]` to the crate attributes to enable
 
 error[E0658]: x86-interrupt ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:91:1
@@ -525,7 +525,7 @@ LL | extern "x86-interrupt" {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/40180
-   = help: add #![feature(abi_x86_interrupt)] to the crate attributes to enable
+   = help: add `#![feature(abi_x86_interrupt)]` to the crate attributes to enable
 
 error[E0658]: thiscall is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:92:1
@@ -533,7 +533,7 @@ error[E0658]: thiscall is experimental and subject to change
 LL | extern "thiscall" {}
    | ^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(abi_thiscall)] to the crate attributes to enable
+   = help: add `#![feature(abi_thiscall)]` to the crate attributes to enable
 
 error[E0658]: amdgpu-kernel ABI is experimental and subject to change
   --> $DIR/feature-gate-abi.rs:93:1
@@ -542,7 +542,7 @@ LL | extern "amdgpu-kernel" {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51575
-   = help: add #![feature(abi_amdgpu_kernel)] to the crate attributes to enable
+   = help: add `#![feature(abi_amdgpu_kernel)]` to the crate attributes to enable
 
 error: aborting due to 63 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-abi_unadjusted.stderr b/src/test/ui/feature-gates/feature-gate-abi_unadjusted.stderr
index fb32ebb1888..4954a7d1f71 100644
--- a/src/test/ui/feature-gates/feature-gate-abi_unadjusted.stderr
+++ b/src/test/ui/feature-gates/feature-gate-abi_unadjusted.stderr
@@ -6,7 +6,7 @@ LL | |
 LL | | }
    | |_^
    |
-   = help: add #![feature(abi_unadjusted)] to the crate attributes to enable
+   = help: add `#![feature(abi_unadjusted)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-alloc-error-handler.rs b/src/test/ui/feature-gates/feature-gate-alloc-error-handler.rs
index df7c3ad6b3d..17b4f775ad4 100644
--- a/src/test/ui/feature-gates/feature-gate-alloc-error-handler.rs
+++ b/src/test/ui/feature-gates/feature-gate-alloc-error-handler.rs
@@ -5,7 +5,7 @@
 
 use core::alloc::Layout;
 
-#[alloc_error_handler] //~ ERROR #[alloc_error_handler] is an unstable feature
+#[alloc_error_handler] //~ ERROR `#[alloc_error_handler]` is an unstable feature
 fn oom(info: Layout) -> ! {
     loop {}
 }
diff --git a/src/test/ui/feature-gates/feature-gate-alloc-error-handler.stderr b/src/test/ui/feature-gates/feature-gate-alloc-error-handler.stderr
index cb01b5caf85..d18cc09ffe7 100644
--- a/src/test/ui/feature-gates/feature-gate-alloc-error-handler.stderr
+++ b/src/test/ui/feature-gates/feature-gate-alloc-error-handler.stderr
@@ -1,11 +1,11 @@
-error[E0658]: #[alloc_error_handler] is an unstable feature
+error[E0658]: `#[alloc_error_handler]` is an unstable feature
   --> $DIR/feature-gate-alloc-error-handler.rs:8:1
    |
 LL | #[alloc_error_handler]
    | ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51540
-   = help: add #![feature(alloc_error_handler)] to the crate attributes to enable
+   = help: add `#![feature(alloc_error_handler)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-allocator_internals.stderr b/src/test/ui/feature-gates/feature-gate-allocator_internals.stderr
index c41dca0ec47..6e276f7bccd 100644
--- a/src/test/ui/feature-gates/feature-gate-allocator_internals.stderr
+++ b/src/test/ui/feature-gates/feature-gate-allocator_internals.stderr
@@ -4,7 +4,7 @@ error[E0658]: the `#[default_lib_allocator]` attribute is an experimental featur
 LL | #![default_lib_allocator]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(allocator_internals)] to the crate attributes to enable
+   = help: add `#![feature(allocator_internals)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-allow-internal-unsafe-nested-macro.stderr b/src/test/ui/feature-gates/feature-gate-allow-internal-unsafe-nested-macro.stderr
index 27324d703a8..72f5642e72a 100644
--- a/src/test/ui/feature-gates/feature-gate-allow-internal-unsafe-nested-macro.stderr
+++ b/src/test/ui/feature-gates/feature-gate-allow-internal-unsafe-nested-macro.stderr
@@ -7,7 +7,7 @@ LL |         #[allow_internal_unsafe]
 LL | bar!();
    | ------- in this macro invocation
    |
-   = help: add #![feature(allow_internal_unsafe)] to the crate attributes to enable
+   = help: add `#![feature(allow_internal_unsafe)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-allow-internal-unstable-nested-macro.stderr b/src/test/ui/feature-gates/feature-gate-allow-internal-unstable-nested-macro.stderr
index 76afd217b81..71005943362 100644
--- a/src/test/ui/feature-gates/feature-gate-allow-internal-unstable-nested-macro.stderr
+++ b/src/test/ui/feature-gates/feature-gate-allow-internal-unstable-nested-macro.stderr
@@ -7,7 +7,7 @@ LL |         #[allow_internal_unstable()]
 LL | bar!();
    | ------- in this macro invocation
    |
-   = help: add #![feature(allow_internal_unstable)] to the crate attributes to enable
+   = help: add `#![feature(allow_internal_unstable)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-allow-internal-unstable-struct.stderr b/src/test/ui/feature-gates/feature-gate-allow-internal-unstable-struct.stderr
index d512e56d0a8..a1acfd55373 100644
--- a/src/test/ui/feature-gates/feature-gate-allow-internal-unstable-struct.stderr
+++ b/src/test/ui/feature-gates/feature-gate-allow-internal-unstable-struct.stderr
@@ -4,7 +4,7 @@ error[E0658]: allow_internal_unstable side-steps feature gating and stability ch
 LL | #[allow_internal_unstable()]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(allow_internal_unstable)] to the crate attributes to enable
+   = help: add `#![feature(allow_internal_unstable)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-allow-internal-unstable.stderr b/src/test/ui/feature-gates/feature-gate-allow-internal-unstable.stderr
index baba7f4bfb5..3c1a4bfc7d2 100644
--- a/src/test/ui/feature-gates/feature-gate-allow-internal-unstable.stderr
+++ b/src/test/ui/feature-gates/feature-gate-allow-internal-unstable.stderr
@@ -4,7 +4,7 @@ error[E0658]: allow_internal_unstable side-steps feature gating and stability ch
 LL | #[allow_internal_unstable()]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(allow_internal_unstable)] to the crate attributes to enable
+   = help: add `#![feature(allow_internal_unstable)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-allow_fail.stderr b/src/test/ui/feature-gates/feature-gate-allow_fail.stderr
index af7c8de61d5..37bf3a262aa 100644
--- a/src/test/ui/feature-gates/feature-gate-allow_fail.stderr
+++ b/src/test/ui/feature-gates/feature-gate-allow_fail.stderr
@@ -5,7 +5,7 @@ LL | #[allow_fail]
    | ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/46488
-   = help: add #![feature(allow_fail)] to the crate attributes to enable
+   = help: add `#![feature(allow_fail)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-arbitrary-self-types.stderr b/src/test/ui/feature-gates/feature-gate-arbitrary-self-types.stderr
index 8d061a95676..ed5fef68918 100644
--- a/src/test/ui/feature-gates/feature-gate-arbitrary-self-types.stderr
+++ b/src/test/ui/feature-gates/feature-gate-arbitrary-self-types.stderr
@@ -5,7 +5,7 @@ LL |     fn foo(self: Ptr<Self>);
    |                  ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44874
-   = help: add #![feature(arbitrary_self_types)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_self_types)]` to the crate attributes to enable
    = help: consider changing to `self`, `&self`, `&mut self`, or `self: Box<Self>`
 
 error[E0658]: `Ptr<Bar>` cannot be used as the type of `self` without the `arbitrary_self_types` feature
@@ -15,7 +15,7 @@ LL |     fn foo(self: Ptr<Self>) {}
    |                  ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44874
-   = help: add #![feature(arbitrary_self_types)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_self_types)]` to the crate attributes to enable
    = help: consider changing to `self`, `&self`, `&mut self`, or `self: Box<Self>`
 
 error[E0658]: `std::boxed::Box<Ptr<Bar>>` cannot be used as the type of `self` without the `arbitrary_self_types` feature
@@ -25,7 +25,7 @@ LL |     fn bar(self: Box<Ptr<Self>>) {}
    |                  ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44874
-   = help: add #![feature(arbitrary_self_types)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_self_types)]` to the crate attributes to enable
    = help: consider changing to `self`, `&self`, `&mut self`, or `self: Box<Self>`
 
 error: aborting due to 3 previous errors
diff --git a/src/test/ui/feature-gates/feature-gate-arbitrary_self_types-raw-pointer.stderr b/src/test/ui/feature-gates/feature-gate-arbitrary_self_types-raw-pointer.stderr
index eda2403e057..4963f9f461c 100644
--- a/src/test/ui/feature-gates/feature-gate-arbitrary_self_types-raw-pointer.stderr
+++ b/src/test/ui/feature-gates/feature-gate-arbitrary_self_types-raw-pointer.stderr
@@ -5,7 +5,7 @@ LL |     fn bar(self: *const Self);
    |                  ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44874
-   = help: add #![feature(arbitrary_self_types)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_self_types)]` to the crate attributes to enable
    = help: consider changing to `self`, `&self`, `&mut self`, or `self: Box<Self>`
 
 error[E0658]: `*const Foo` cannot be used as the type of `self` without the `arbitrary_self_types` feature
@@ -15,7 +15,7 @@ LL |     fn foo(self: *const Self) {}
    |                  ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44874
-   = help: add #![feature(arbitrary_self_types)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_self_types)]` to the crate attributes to enable
    = help: consider changing to `self`, `&self`, `&mut self`, or `self: Box<Self>`
 
 error[E0658]: `*const ()` cannot be used as the type of `self` without the `arbitrary_self_types` feature
@@ -25,7 +25,7 @@ LL |     fn bar(self: *const Self) {}
    |                  ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44874
-   = help: add #![feature(arbitrary_self_types)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_self_types)]` to the crate attributes to enable
    = help: consider changing to `self`, `&self`, `&mut self`, or `self: Box<Self>`
 
 error: aborting due to 3 previous errors
diff --git a/src/test/ui/feature-gates/feature-gate-asm.stderr b/src/test/ui/feature-gates/feature-gate-asm.stderr
index 30a7582a92b..0d7f8d819ab 100644
--- a/src/test/ui/feature-gates/feature-gate-asm.stderr
+++ b/src/test/ui/feature-gates/feature-gate-asm.stderr
@@ -5,7 +5,7 @@ LL |         asm!("");
    |         ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29722
-   = help: add #![feature(asm)] to the crate attributes to enable
+   = help: add `#![feature(asm)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-asm2.stderr b/src/test/ui/feature-gates/feature-gate-asm2.stderr
index 8f4c6806a97..b60a34be434 100644
--- a/src/test/ui/feature-gates/feature-gate-asm2.stderr
+++ b/src/test/ui/feature-gates/feature-gate-asm2.stderr
@@ -5,7 +5,7 @@ LL |         println!("{:?}", asm!(""));
    |                          ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29722
-   = help: add #![feature(asm)] to the crate attributes to enable
+   = help: add `#![feature(asm)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-assoc-type-defaults.stderr b/src/test/ui/feature-gates/feature-gate-assoc-type-defaults.stderr
index 16b37cf29ca..6d3f40c807e 100644
--- a/src/test/ui/feature-gates/feature-gate-assoc-type-defaults.stderr
+++ b/src/test/ui/feature-gates/feature-gate-assoc-type-defaults.stderr
@@ -5,7 +5,7 @@ LL |     type Bar = u8;
    |     ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29661
-   = help: add #![feature(associated_type_defaults)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_defaults)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-associated_type_bounds.stderr b/src/test/ui/feature-gates/feature-gate-associated_type_bounds.stderr
index 702f61262df..cd74916bea4 100644
--- a/src/test/ui/feature-gates/feature-gate-associated_type_bounds.stderr
+++ b/src/test/ui/feature-gates/feature-gate-associated_type_bounds.stderr
@@ -5,7 +5,7 @@ LL |     type A: Iterator<Item: Copy>;
    |                      ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:15:22
@@ -14,7 +14,7 @@ LL |     type B: Iterator<Item: 'static>;
    |                      ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:19:20
@@ -23,7 +23,7 @@ LL | struct _St1<T: Tr1<As1: Tr2>> {
    |                    ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:26:18
@@ -32,7 +32,7 @@ LL | enum _En1<T: Tr1<As1: Tr2>> {
    |                  ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:33:19
@@ -41,7 +41,7 @@ LL | union _Un1<T: Tr1<As1: Tr2>> {
    |                   ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:40:37
@@ -50,7 +50,7 @@ LL | type _TaWhere1<T> where T: Iterator<Item: Copy> = T;
    |                                     ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:43:22
@@ -59,7 +59,7 @@ LL | fn _apit(_: impl Tr1<As1: Copy>) {}
    |                      ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:45:26
@@ -68,7 +68,7 @@ LL | fn _apit_dyn(_: &dyn Tr1<As1: Copy>) {}
    |                          ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:48:24
@@ -77,7 +77,7 @@ LL | fn _rpit() -> impl Tr1<As1: Copy> { S1 }
    |                        ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:51:31
@@ -86,7 +86,7 @@ LL | fn _rpit_dyn() -> Box<dyn Tr1<As1: Copy>> { Box::new(S1) }
    |                               ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:54:23
@@ -95,7 +95,7 @@ LL | const _cdef: impl Tr1<As1: Copy> = S1;
    |                       ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:60:24
@@ -104,7 +104,7 @@ LL | static _sdef: impl Tr1<As1: Copy> = S1;
    |                        ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0658]: associated type bounds are unstable
   --> $DIR/feature-gate-associated_type_bounds.rs:67:21
@@ -113,7 +113,7 @@ LL |     let _: impl Tr1<As1: Copy> = S1;
    |                     ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/52662
-   = help: add #![feature(associated_type_bounds)] to the crate attributes to enable
+   = help: add `#![feature(associated_type_bounds)]` to the crate attributes to enable
 
 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
   --> $DIR/feature-gate-associated_type_bounds.rs:54:14
diff --git a/src/test/ui/feature-gates/feature-gate-async-await-2015-edition.stderr b/src/test/ui/feature-gates/feature-gate-async-await-2015-edition.stderr
index b419f1232df..0157ed55344 100644
--- a/src/test/ui/feature-gates/feature-gate-async-await-2015-edition.stderr
+++ b/src/test/ui/feature-gates/feature-gate-async-await-2015-edition.stderr
@@ -23,7 +23,7 @@ LL | async fn foo() {}
    | ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/50547
-   = help: add #![feature(async_await)] to the crate attributes to enable
+   = help: add `#![feature(async_await)]` to the crate attributes to enable
 
 error: aborting due to 4 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-async-await.stderr b/src/test/ui/feature-gates/feature-gate-async-await.stderr
index 1ea4da8da0c..9f4a90157a4 100644
--- a/src/test/ui/feature-gates/feature-gate-async-await.stderr
+++ b/src/test/ui/feature-gates/feature-gate-async-await.stderr
@@ -11,7 +11,7 @@ LL |     async fn foo() {}
    |     ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/50547
-   = help: add #![feature(async_await)] to the crate attributes to enable
+   = help: add `#![feature(async_await)]` to the crate attributes to enable
 
 error[E0658]: async fn is unstable
   --> $DIR/feature-gate-async-await.rs:10:5
@@ -20,7 +20,7 @@ LL |     async fn foo();
    |     ^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/50547
-   = help: add #![feature(async_await)] to the crate attributes to enable
+   = help: add `#![feature(async_await)]` to the crate attributes to enable
 
 error[E0658]: async fn is unstable
   --> $DIR/feature-gate-async-await.rs:14:1
@@ -29,7 +29,7 @@ LL | async fn foo() {}
    | ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/50547
-   = help: add #![feature(async_await)] to the crate attributes to enable
+   = help: add `#![feature(async_await)]` to the crate attributes to enable
 
 error[E0658]: async blocks are unstable
   --> $DIR/feature-gate-async-await.rs:17:13
@@ -38,7 +38,7 @@ LL |     let _ = async {};
    |             ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/50547
-   = help: add #![feature(async_await)] to the crate attributes to enable
+   = help: add `#![feature(async_await)]` to the crate attributes to enable
 
 error: aborting due to 5 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-box-expr.stderr b/src/test/ui/feature-gates/feature-gate-box-expr.stderr
index 9666793313e..1f243b23677 100644
--- a/src/test/ui/feature-gates/feature-gate-box-expr.stderr
+++ b/src/test/ui/feature-gates/feature-gate-box-expr.stderr
@@ -5,7 +5,7 @@ LL |     let x = box 'c';
    |             ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49733
-   = help: add #![feature(box_syntax)] to the crate attributes to enable
+   = help: add `#![feature(box_syntax)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-box_patterns.stderr b/src/test/ui/feature-gates/feature-gate-box_patterns.stderr
index 765b929de8a..d2dafe93a86 100644
--- a/src/test/ui/feature-gates/feature-gate-box_patterns.stderr
+++ b/src/test/ui/feature-gates/feature-gate-box_patterns.stderr
@@ -5,7 +5,7 @@ LL |     let box x = Box::new('c');
    |         ^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29641
-   = help: add #![feature(box_patterns)] to the crate attributes to enable
+   = help: add `#![feature(box_patterns)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-box_syntax.stderr b/src/test/ui/feature-gates/feature-gate-box_syntax.stderr
index a9cac7686ea..61b0534d2dc 100644
--- a/src/test/ui/feature-gates/feature-gate-box_syntax.stderr
+++ b/src/test/ui/feature-gates/feature-gate-box_syntax.stderr
@@ -5,7 +5,7 @@ LL |     let x = box 3;
    |             ^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49733
-   = help: add #![feature(box_syntax)] to the crate attributes to enable
+   = help: add `#![feature(box_syntax)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-cfg-target-has-atomic.stderr b/src/test/ui/feature-gates/feature-gate-cfg-target-has-atomic.stderr
index 995528efdd3..1765bc7809c 100644
--- a/src/test/ui/feature-gates/feature-gate-cfg-target-has-atomic.stderr
+++ b/src/test/ui/feature-gates/feature-gate-cfg-target-has-atomic.stderr
@@ -5,7 +5,7 @@ LL | #[cfg(target_has_atomic = "8")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:21:7
@@ -14,7 +14,7 @@ LL | #[cfg(target_has_atomic = "8")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:26:7
@@ -23,7 +23,7 @@ LL | #[cfg(target_has_atomic = "16")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:31:7
@@ -32,7 +32,7 @@ LL | #[cfg(target_has_atomic = "16")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:36:7
@@ -41,7 +41,7 @@ LL | #[cfg(target_has_atomic = "32")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:41:7
@@ -50,7 +50,7 @@ LL | #[cfg(target_has_atomic = "32")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:46:7
@@ -59,7 +59,7 @@ LL | #[cfg(target_has_atomic = "64")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:51:7
@@ -68,7 +68,7 @@ LL | #[cfg(target_has_atomic = "64")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:56:7
@@ -77,7 +77,7 @@ LL | #[cfg(target_has_atomic = "128")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:61:7
@@ -86,7 +86,7 @@ LL | #[cfg(target_has_atomic = "128")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:66:7
@@ -95,7 +95,7 @@ LL | #[cfg(target_has_atomic = "ptr")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:71:7
@@ -104,7 +104,7 @@ LL | #[cfg(target_has_atomic = "ptr")]
    |       ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:78:10
@@ -113,7 +113,7 @@ LL |     cfg!(target_has_atomic = "8");
    |          ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:80:10
@@ -122,7 +122,7 @@ LL |     cfg!(target_has_atomic = "16");
    |          ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:82:10
@@ -131,7 +131,7 @@ LL |     cfg!(target_has_atomic = "32");
    |          ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:84:10
@@ -140,7 +140,7 @@ LL |     cfg!(target_has_atomic = "64");
    |          ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:86:10
@@ -149,7 +149,7 @@ LL |     cfg!(target_has_atomic = "128");
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error[E0658]: `cfg(target_has_atomic)` is experimental and subject to change
   --> $DIR/feature-gate-cfg-target-has-atomic.rs:88:10
@@ -158,7 +158,7 @@ LL |     cfg!(target_has_atomic = "ptr");
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32976
-   = help: add #![feature(cfg_target_has_atomic)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_has_atomic)]` to the crate attributes to enable
 
 error: aborting due to 18 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-cfg-target-thread-local.stderr b/src/test/ui/feature-gates/feature-gate-cfg-target-thread-local.stderr
index 3d24b218253..57654493101 100644
--- a/src/test/ui/feature-gates/feature-gate-cfg-target-thread-local.stderr
+++ b/src/test/ui/feature-gates/feature-gate-cfg-target-thread-local.stderr
@@ -5,7 +5,7 @@ LL |     #[cfg_attr(target_thread_local, thread_local)]
    |                ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29594
-   = help: add #![feature(cfg_target_thread_local)] to the crate attributes to enable
+   = help: add `#![feature(cfg_target_thread_local)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-compiler-builtins.stderr b/src/test/ui/feature-gates/feature-gate-compiler-builtins.stderr
index 278a184bae2..9d04aef8621 100644
--- a/src/test/ui/feature-gates/feature-gate-compiler-builtins.stderr
+++ b/src/test/ui/feature-gates/feature-gate-compiler-builtins.stderr
@@ -4,7 +4,7 @@ error[E0658]: the `#[compiler_builtins]` attribute is used to identify the `comp
 LL | #![compiler_builtins]
    | ^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(compiler_builtins)] to the crate attributes to enable
+   = help: add `#![feature(compiler_builtins)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-concat_idents.stderr b/src/test/ui/feature-gates/feature-gate-concat_idents.stderr
index 2a1e5f54592..4dc687451df 100644
--- a/src/test/ui/feature-gates/feature-gate-concat_idents.stderr
+++ b/src/test/ui/feature-gates/feature-gate-concat_idents.stderr
@@ -5,7 +5,7 @@ LL |     let a = concat_idents!(X, Y_1);
    |             ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29599
-   = help: add #![feature(concat_idents)] to the crate attributes to enable
+   = help: add `#![feature(concat_idents)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'concat_idents': `concat_idents` is not stable enough for use and is subject to change
   --> $DIR/feature-gate-concat_idents.rs:6:13
@@ -14,7 +14,7 @@ LL |     let b = concat_idents!(X, Y_2);
    |             ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29599
-   = help: add #![feature(concat_idents)] to the crate attributes to enable
+   = help: add `#![feature(concat_idents)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-concat_idents2.stderr b/src/test/ui/feature-gates/feature-gate-concat_idents2.stderr
index 0dc6c13734e..4eb038b4a55 100644
--- a/src/test/ui/feature-gates/feature-gate-concat_idents2.stderr
+++ b/src/test/ui/feature-gates/feature-gate-concat_idents2.stderr
@@ -5,7 +5,7 @@ LL |     concat_idents!(a, b);
    |     ^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29599
-   = help: add #![feature(concat_idents)] to the crate attributes to enable
+   = help: add `#![feature(concat_idents)]` to the crate attributes to enable
 
 error[E0425]: cannot find value `ab` in this scope
   --> $DIR/feature-gate-concat_idents2.rs:4:5
diff --git a/src/test/ui/feature-gates/feature-gate-concat_idents3.stderr b/src/test/ui/feature-gates/feature-gate-concat_idents3.stderr
index 543570f0afc..e96cd4734d8 100644
--- a/src/test/ui/feature-gates/feature-gate-concat_idents3.stderr
+++ b/src/test/ui/feature-gates/feature-gate-concat_idents3.stderr
@@ -5,7 +5,7 @@ LL |     assert_eq!(10, concat_idents!(X, Y_1));
    |                    ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29599
-   = help: add #![feature(concat_idents)] to the crate attributes to enable
+   = help: add `#![feature(concat_idents)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'concat_idents': `concat_idents` is not stable enough for use and is subject to change
   --> $DIR/feature-gate-concat_idents3.rs:8:20
@@ -14,7 +14,7 @@ LL |     assert_eq!(20, concat_idents!(X, Y_2));
    |                    ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29599
-   = help: add #![feature(concat_idents)] to the crate attributes to enable
+   = help: add `#![feature(concat_idents)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-const_fn.stderr b/src/test/ui/feature-gates/feature-gate-const_fn.stderr
index b4d64c24221..c5c39cc2009 100644
--- a/src/test/ui/feature-gates/feature-gate-const_fn.stderr
+++ b/src/test/ui/feature-gates/feature-gate-const_fn.stderr
@@ -23,7 +23,7 @@ LL |     const fn foo() -> u32;
    |     ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error[E0658]: const fn is unstable
   --> $DIR/feature-gate-const_fn.rs:8:5
@@ -32,7 +32,7 @@ LL |     const fn bar() -> u32 { 0 }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error: aborting due to 5 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-const_generics.stderr b/src/test/ui/feature-gates/feature-gate-const_generics.stderr
index 9ea04a1e204..468e9c31d37 100644
--- a/src/test/ui/feature-gates/feature-gate-const_generics.stderr
+++ b/src/test/ui/feature-gates/feature-gate-const_generics.stderr
@@ -5,7 +5,7 @@ LL | fn foo<const X: ()>() {}
    |              ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44580
-   = help: add #![feature(const_generics)] to the crate attributes to enable
+   = help: add `#![feature(const_generics)]` to the crate attributes to enable
 
 error[E0658]: const generics are unstable
   --> $DIR/feature-gate-const_generics.rs:3:18
@@ -14,7 +14,7 @@ LL | struct Foo<const X: usize>([(); X]);
    |                  ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44580
-   = help: add #![feature(const_generics)] to the crate attributes to enable
+   = help: add `#![feature(const_generics)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-const_transmute.stderr b/src/test/ui/feature-gates/feature-gate-const_transmute.stderr
index c3cd3131342..41b653d98dc 100644
--- a/src/test/ui/feature-gates/feature-gate-const_transmute.stderr
+++ b/src/test/ui/feature-gates/feature-gate-const_transmute.stderr
@@ -5,7 +5,7 @@ LL | const TRANSMUTED_U32: u32 = unsafe { mem::transmute(Foo(3)) };
    |                                      ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53605
-   = help: add #![feature(const_transmute)] to the crate attributes to enable
+   = help: add `#![feature(const_transmute)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-crate_visibility_modifier.stderr b/src/test/ui/feature-gates/feature-gate-crate_visibility_modifier.stderr
index 4e70870ae72..1e061eced36 100644
--- a/src/test/ui/feature-gates/feature-gate-crate_visibility_modifier.stderr
+++ b/src/test/ui/feature-gates/feature-gate-crate_visibility_modifier.stderr
@@ -5,7 +5,7 @@ LL | crate struct Bender {
    | ^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53120
-   = help: add #![feature(crate_visibility_modifier)] to the crate attributes to enable
+   = help: add `#![feature(crate_visibility_modifier)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-custom_attribute.stderr b/src/test/ui/feature-gates/feature-gate-custom_attribute.stderr
index 9b81c38f86b..12175feadd6 100644
--- a/src/test/ui/feature-gates/feature-gate-custom_attribute.stderr
+++ b/src/test/ui/feature-gates/feature-gate-custom_attribute.stderr
@@ -5,7 +5,7 @@ LL | #[fake_attr]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:8:3
@@ -14,7 +14,7 @@ LL | #[fake_attr(100)]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:9:3
@@ -23,7 +23,7 @@ LL | #[fake_attr(1, 2, 3)]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:10:3
@@ -32,7 +32,7 @@ LL | #[fake_attr("hello")]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:11:3
@@ -41,7 +41,7 @@ LL | #[fake_attr(name = "hello")]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:12:3
@@ -50,7 +50,7 @@ LL | #[fake_attr(1, "hi", key = 12, true, false)]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:13:3
@@ -59,7 +59,7 @@ LL | #[fake_attr(key = "hello", val = 10)]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:14:3
@@ -68,7 +68,7 @@ LL | #[fake_attr(key("hello"), val(10))]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:15:3
@@ -77,7 +77,7 @@ LL | #[fake_attr(enabled = true, disabled = false)]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:16:3
@@ -86,7 +86,7 @@ LL | #[fake_attr(true)]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:17:3
@@ -95,7 +95,7 @@ LL | #[fake_attr(pi = 3.14159)]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:18:3
@@ -104,7 +104,7 @@ LL | #[fake_attr(b"hi")]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `fake_doc` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute.rs:19:3
@@ -113,7 +113,7 @@ LL | #[fake_doc(r"doc")]
    |   ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 13 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-custom_attribute2.stderr b/src/test/ui/feature-gates/feature-gate-custom_attribute2.stderr
index 8c8ac1233a0..f159308dcb8 100644
--- a/src/test/ui/feature-gates/feature-gate-custom_attribute2.stderr
+++ b/src/test/ui/feature-gates/feature-gate-custom_attribute2.stderr
@@ -5,7 +5,7 @@ LL | struct StLt<#[lt_struct] 'a>(&'a u32);
    |             ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `ty_struct` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:8:13
@@ -14,7 +14,7 @@ LL | struct StTy<#[ty_struct] I>(I);
    |             ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `lt_enum` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:11:11
@@ -23,7 +23,7 @@ LL | enum EnLt<#[lt_enum] 'b> { A(&'b u32), B }
    |           ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `ty_enum` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:13:11
@@ -32,7 +32,7 @@ LL | enum EnTy<#[ty_enum] J> { A(J), B }
    |           ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `lt_trait` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:16:12
@@ -41,7 +41,7 @@ LL | trait TrLt<#[lt_trait] 'c> { fn foo(&self, _: &'c [u32]) -> &'c u32; }
    |            ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `ty_trait` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:18:12
@@ -50,7 +50,7 @@ LL | trait TrTy<#[ty_trait] K> { fn foo(&self, _: K); }
    |            ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `lt_type` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:21:11
@@ -59,7 +59,7 @@ LL | type TyLt<#[lt_type] 'd> = &'d u32;
    |           ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `ty_type` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:23:11
@@ -68,7 +68,7 @@ LL | type TyTy<#[ty_type] L> = (L, );
    |           ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `lt_inherent` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:26:6
@@ -77,7 +77,7 @@ LL | impl<#[lt_inherent] 'e> StLt<'e> { }
    |      ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `ty_inherent` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:28:6
@@ -86,7 +86,7 @@ LL | impl<#[ty_inherent] M> StTy<M> { }
    |      ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `lt_impl_for` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:31:6
@@ -95,7 +95,7 @@ LL | impl<#[lt_impl_for] 'f> TrLt<'f> for StLt<'f> {
    |      ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `ty_impl_for` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:35:6
@@ -104,7 +104,7 @@ LL | impl<#[ty_impl_for] N> TrTy<N> for StTy<N> {
    |      ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `lt_fn` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:40:9
@@ -113,7 +113,7 @@ LL | fn f_lt<#[lt_fn] 'g>(_: &'g [u32]) -> &'g u32 { loop { } }
    |         ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `ty_fn` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:42:9
@@ -122,7 +122,7 @@ LL | fn f_ty<#[ty_fn] O>(_: O) { }
    |         ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `lt_meth` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:46:13
@@ -131,7 +131,7 @@ LL |     fn m_lt<#[lt_meth] 'h>(_: &'h [u32]) -> &'h u32 { loop { } }
    |             ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `ty_meth` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:48:13
@@ -140,7 +140,7 @@ LL |     fn m_ty<#[ty_meth] P>(_: P) { }
    |             ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `lt_hof` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-custom_attribute2.rs:53:19
@@ -149,7 +149,7 @@ LL |     where Q: for <#[lt_hof] 'i> Fn(&'i [u32]) -> &'i u32
    |                   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 17 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-custom_test_frameworks.stderr b/src/test/ui/feature-gates/feature-gate-custom_test_frameworks.stderr
index 31ff7aebe3a..1cc53db2c36 100644
--- a/src/test/ui/feature-gates/feature-gate-custom_test_frameworks.stderr
+++ b/src/test/ui/feature-gates/feature-gate-custom_test_frameworks.stderr
@@ -5,7 +5,7 @@ LL | #[test_case]
    | ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/50297
-   = help: add #![feature(custom_test_frameworks)] to the crate attributes to enable
+   = help: add `#![feature(custom_test_frameworks)]` to the crate attributes to enable
 
 error[E0658]: custom test frameworks are an unstable feature
   --> $DIR/feature-gate-custom_test_frameworks.rs:1:1
@@ -14,7 +14,7 @@ LL | #![test_runner(main)]
    | ^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/50297
-   = help: add #![feature(custom_test_frameworks)] to the crate attributes to enable
+   = help: add `#![feature(custom_test_frameworks)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-decl_macro.stderr b/src/test/ui/feature-gates/feature-gate-decl_macro.stderr
index 808363a0048..905a1b15310 100644
--- a/src/test/ui/feature-gates/feature-gate-decl_macro.stderr
+++ b/src/test/ui/feature-gates/feature-gate-decl_macro.stderr
@@ -5,7 +5,7 @@ LL | macro m() {}
    | ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/39412
-   = help: add #![feature(decl_macro)] to the crate attributes to enable
+   = help: add `#![feature(decl_macro)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-doc_alias.rs b/src/test/ui/feature-gates/feature-gate-doc_alias.rs
index d7980f882d9..adb6fc217a3 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_alias.rs
+++ b/src/test/ui/feature-gates/feature-gate-doc_alias.rs
@@ -1,4 +1,4 @@
-#[doc(alias = "foo")] //~ ERROR: #[doc(alias = "...")] is experimental
+#[doc(alias = "foo")] //~ ERROR: `#[doc(alias = "...")]` is experimental
 pub struct Foo;
 
 fn main() {}
diff --git a/src/test/ui/feature-gates/feature-gate-doc_alias.stderr b/src/test/ui/feature-gates/feature-gate-doc_alias.stderr
index be85ae4b137..dddaa45de8f 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_alias.stderr
+++ b/src/test/ui/feature-gates/feature-gate-doc_alias.stderr
@@ -1,11 +1,11 @@
-error[E0658]: #[doc(alias = "...")] is experimental
+error[E0658]: `#[doc(alias = "...")]` is experimental
   --> $DIR/feature-gate-doc_alias.rs:1:1
    |
 LL | #[doc(alias = "foo")]
    | ^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/50146
-   = help: add #![feature(doc_alias)] to the crate attributes to enable
+   = help: add `#![feature(doc_alias)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-doc_cfg-cfg-rustdoc.stderr b/src/test/ui/feature-gates/feature-gate-doc_cfg-cfg-rustdoc.stderr
index 0f84a1b11f0..9bf97a4a477 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_cfg-cfg-rustdoc.stderr
+++ b/src/test/ui/feature-gates/feature-gate-doc_cfg-cfg-rustdoc.stderr
@@ -5,7 +5,7 @@ LL | #[cfg(rustdoc)]
    |       ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/43781
-   = help: add #![feature(doc_cfg)] to the crate attributes to enable
+   = help: add `#![feature(doc_cfg)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-doc_cfg.rs b/src/test/ui/feature-gates/feature-gate-doc_cfg.rs
index f13129888b4..bb3846e7f6b 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_cfg.rs
+++ b/src/test/ui/feature-gates/feature-gate-doc_cfg.rs
@@ -1,2 +1,2 @@
-#[doc(cfg(unix))] //~ ERROR: #[doc(cfg(...))] is experimental
+#[doc(cfg(unix))] //~ ERROR: `#[doc(cfg(...))]` is experimental
 fn main() {}
diff --git a/src/test/ui/feature-gates/feature-gate-doc_cfg.stderr b/src/test/ui/feature-gates/feature-gate-doc_cfg.stderr
index 9e4aa6c7a07..7b0a231df4c 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_cfg.stderr
+++ b/src/test/ui/feature-gates/feature-gate-doc_cfg.stderr
@@ -1,11 +1,11 @@
-error[E0658]: #[doc(cfg(...))] is experimental
+error[E0658]: `#[doc(cfg(...))]` is experimental
   --> $DIR/feature-gate-doc_cfg.rs:1:1
    |
 LL | #[doc(cfg(unix))]
    | ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/43781
-   = help: add #![feature(doc_cfg)] to the crate attributes to enable
+   = help: add `#![feature(doc_cfg)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-doc_keyword.rs b/src/test/ui/feature-gates/feature-gate-doc_keyword.rs
index b08940e28f4..6cdcfa67c3a 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_keyword.rs
+++ b/src/test/ui/feature-gates/feature-gate-doc_keyword.rs
@@ -1,4 +1,4 @@
-#[doc(keyword = "match")] //~ ERROR: #[doc(keyword = "...")] is experimental
+#[doc(keyword = "match")] //~ ERROR: `#[doc(keyword = "...")]` is experimental
 /// wonderful
 mod foo{}
 
diff --git a/src/test/ui/feature-gates/feature-gate-doc_keyword.stderr b/src/test/ui/feature-gates/feature-gate-doc_keyword.stderr
index 6e464781721..abde0bea9b2 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_keyword.stderr
+++ b/src/test/ui/feature-gates/feature-gate-doc_keyword.stderr
@@ -1,11 +1,11 @@
-error[E0658]: #[doc(keyword = "...")] is experimental
+error[E0658]: `#[doc(keyword = "...")]` is experimental
   --> $DIR/feature-gate-doc_keyword.rs:1:1
    |
 LL | #[doc(keyword = "match")]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51315
-   = help: add #![feature(doc_keyword)] to the crate attributes to enable
+   = help: add `#![feature(doc_keyword)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-doc_masked.rs b/src/test/ui/feature-gates/feature-gate-doc_masked.rs
index 034c5cf52ee..bde3af6b594 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_masked.rs
+++ b/src/test/ui/feature-gates/feature-gate-doc_masked.rs
@@ -1,4 +1,4 @@
-#[doc(masked)] //~ ERROR: #[doc(masked)] is experimental
+#[doc(masked)] //~ ERROR: `#[doc(masked)]` is experimental
 extern crate std as realstd;
 
 fn main() {}
diff --git a/src/test/ui/feature-gates/feature-gate-doc_masked.stderr b/src/test/ui/feature-gates/feature-gate-doc_masked.stderr
index d778d4d994c..0d334fab410 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_masked.stderr
+++ b/src/test/ui/feature-gates/feature-gate-doc_masked.stderr
@@ -1,11 +1,11 @@
-error[E0658]: #[doc(masked)] is experimental
+error[E0658]: `#[doc(masked)]` is experimental
   --> $DIR/feature-gate-doc_masked.rs:1:1
    |
 LL | #[doc(masked)]
    | ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44027
-   = help: add #![feature(doc_masked)] to the crate attributes to enable
+   = help: add `#![feature(doc_masked)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-doc_spotlight.rs b/src/test/ui/feature-gates/feature-gate-doc_spotlight.rs
index 28b689b4d98..452b45b3445 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_spotlight.rs
+++ b/src/test/ui/feature-gates/feature-gate-doc_spotlight.rs
@@ -1,4 +1,4 @@
-#[doc(spotlight)] //~ ERROR: #[doc(spotlight)] is experimental
+#[doc(spotlight)] //~ ERROR: `#[doc(spotlight)]` is experimental
 trait SomeTrait {}
 
 fn main() {}
diff --git a/src/test/ui/feature-gates/feature-gate-doc_spotlight.stderr b/src/test/ui/feature-gates/feature-gate-doc_spotlight.stderr
index 2bf201f4907..16532e44334 100644
--- a/src/test/ui/feature-gates/feature-gate-doc_spotlight.stderr
+++ b/src/test/ui/feature-gates/feature-gate-doc_spotlight.stderr
@@ -1,11 +1,11 @@
-error[E0658]: #[doc(spotlight)] is experimental
+error[E0658]: `#[doc(spotlight)]` is experimental
   --> $DIR/feature-gate-doc_spotlight.rs:1:1
    |
 LL | #[doc(spotlight)]
    | ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/45040
-   = help: add #![feature(doc_spotlight)] to the crate attributes to enable
+   = help: add `#![feature(doc_spotlight)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-dropck-ugeh.stderr b/src/test/ui/feature-gates/feature-gate-dropck-ugeh.stderr
index 9c7f7b2178d..581b760ba4f 100644
--- a/src/test/ui/feature-gates/feature-gate-dropck-ugeh.stderr
+++ b/src/test/ui/feature-gates/feature-gate-dropck-ugeh.stderr
@@ -5,7 +5,7 @@ LL |     #[unsafe_destructor_blind_to_params] // This is the UGEH attribute
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/28498
-   = help: add #![feature(dropck_parametricity)] to the crate attributes to enable
+   = help: add `#![feature(dropck_parametricity)]` to the crate attributes to enable
 
 warning: use of deprecated attribute `dropck_parametricity`: unsafe_destructor_blind_to_params has been replaced by may_dangle and will be removed in the future. See https://github.com/rust-lang/rust/issues/34761
   --> $DIR/feature-gate-dropck-ugeh.rs:16:5
diff --git a/src/test/ui/feature-gates/feature-gate-exclusive-range-pattern.stderr b/src/test/ui/feature-gates/feature-gate-exclusive-range-pattern.stderr
index 0eb6da3b125..ee20408d178 100644
--- a/src/test/ui/feature-gates/feature-gate-exclusive-range-pattern.stderr
+++ b/src/test/ui/feature-gates/feature-gate-exclusive-range-pattern.stderr
@@ -5,7 +5,7 @@ LL |         0 .. 3 => {}
    |         ^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
-   = help: add #![feature(exclusive_range_pattern)] to the crate attributes to enable
+   = help: add `#![feature(exclusive_range_pattern)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-existential-type.stderr b/src/test/ui/feature-gates/feature-gate-existential-type.stderr
index efaf29c00da..29d047d22e1 100644
--- a/src/test/ui/feature-gates/feature-gate-existential-type.stderr
+++ b/src/test/ui/feature-gates/feature-gate-existential-type.stderr
@@ -5,7 +5,7 @@ LL | existential type Foo: std::fmt::Debug;
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/34511
-   = help: add #![feature(existential_type)] to the crate attributes to enable
+   = help: add `#![feature(existential_type)]` to the crate attributes to enable
 
 error[E0658]: existential types are unstable
   --> $DIR/feature-gate-existential-type.rs:11:5
@@ -14,7 +14,7 @@ LL |     existential type Baa: std::fmt::Debug;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/34511
-   = help: add #![feature(existential_type)] to the crate attributes to enable
+   = help: add `#![feature(existential_type)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-extern_types.stderr b/src/test/ui/feature-gates/feature-gate-extern_types.stderr
index 18c0bae2c4b..f82c64f9ca6 100644
--- a/src/test/ui/feature-gates/feature-gate-extern_types.stderr
+++ b/src/test/ui/feature-gates/feature-gate-extern_types.stderr
@@ -5,7 +5,7 @@ LL |     type T;
    |     ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/43467
-   = help: add #![feature(extern_types)] to the crate attributes to enable
+   = help: add `#![feature(extern_types)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-external_doc.rs b/src/test/ui/feature-gates/feature-gate-external_doc.rs
index e3ffb88819b..dec3fa18579 100644
--- a/src/test/ui/feature-gates/feature-gate-external_doc.rs
+++ b/src/test/ui/feature-gates/feature-gate-external_doc.rs
@@ -1,2 +1,2 @@
-#[doc(include="asdf.md")] //~ ERROR: #[doc(include = "...")] is experimental
+#[doc(include="asdf.md")] //~ ERROR: `#[doc(include = "...")]` is experimental
 fn main() {}
diff --git a/src/test/ui/feature-gates/feature-gate-external_doc.stderr b/src/test/ui/feature-gates/feature-gate-external_doc.stderr
index 79e4f8e9b62..a5a874374d1 100644
--- a/src/test/ui/feature-gates/feature-gate-external_doc.stderr
+++ b/src/test/ui/feature-gates/feature-gate-external_doc.stderr
@@ -1,11 +1,11 @@
-error[E0658]: #[doc(include = "...")] is experimental
+error[E0658]: `#[doc(include = "...")]` is experimental
   --> $DIR/feature-gate-external_doc.rs:1:1
    |
 LL | #[doc(include="asdf.md")]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44732
-   = help: add #![feature(external_doc)] to the crate attributes to enable
+   = help: add `#![feature(external_doc)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-ffi_returns_twice.stderr b/src/test/ui/feature-gates/feature-gate-ffi_returns_twice.stderr
index 72e414eab92..b452db86bb9 100644
--- a/src/test/ui/feature-gates/feature-gate-ffi_returns_twice.stderr
+++ b/src/test/ui/feature-gates/feature-gate-ffi_returns_twice.stderr
@@ -5,7 +5,7 @@ LL |     #[ffi_returns_twice]
    |     ^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/58314
-   = help: add #![feature(ffi_returns_twice)] to the crate attributes to enable
+   = help: add `#![feature(ffi_returns_twice)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-format_args_nl.stderr b/src/test/ui/feature-gates/feature-gate-format_args_nl.stderr
index 5cf48d8749c..b836a508f7b 100644
--- a/src/test/ui/feature-gates/feature-gate-format_args_nl.stderr
+++ b/src/test/ui/feature-gates/feature-gate-format_args_nl.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'format_args_nl': `format_args_nl`
 LL |     format_args_nl!("");
    |     ^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(format_args_nl)] to the crate attributes to enable
+   = help: add `#![feature(format_args_nl)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-fundamental.stderr b/src/test/ui/feature-gates/feature-gate-fundamental.stderr
index 265b576bc79..409148484c8 100644
--- a/src/test/ui/feature-gates/feature-gate-fundamental.stderr
+++ b/src/test/ui/feature-gates/feature-gate-fundamental.stderr
@@ -5,7 +5,7 @@ LL | #[fundamental]
    | ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29635
-   = help: add #![feature(fundamental)] to the crate attributes to enable
+   = help: add `#![feature(fundamental)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-generators.stderr b/src/test/ui/feature-gates/feature-gate-generators.stderr
index d85dc18d03d..cdb05601254 100644
--- a/src/test/ui/feature-gates/feature-gate-generators.stderr
+++ b/src/test/ui/feature-gates/feature-gate-generators.stderr
@@ -5,7 +5,7 @@ LL |     yield true;
    |     ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/43122
-   = help: add #![feature(generators)] to the crate attributes to enable
+   = help: add `#![feature(generators)]` to the crate attributes to enable
 
 error[E0627]: yield statement outside of generator literal
   --> $DIR/feature-gate-generators.rs:2:5
diff --git a/src/test/ui/feature-gates/feature-gate-generic_associated_types.stderr b/src/test/ui/feature-gates/feature-gate-generic_associated_types.stderr
index d37dd93983c..04473f41069 100644
--- a/src/test/ui/feature-gates/feature-gate-generic_associated_types.stderr
+++ b/src/test/ui/feature-gates/feature-gate-generic_associated_types.stderr
@@ -5,7 +5,7 @@ LL |     type Pointer<T>: Deref<Target = T>;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44265
-   = help: add #![feature(generic_associated_types)] to the crate attributes to enable
+   = help: add `#![feature(generic_associated_types)]` to the crate attributes to enable
 
 error[E0658]: generic associated types are unstable
   --> $DIR/feature-gate-generic_associated_types.rs:6:5
@@ -14,7 +14,7 @@ LL |     type Pointer2<T>: Deref<Target = T> where T: Clone, U: Clone;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44265
-   = help: add #![feature(generic_associated_types)] to the crate attributes to enable
+   = help: add `#![feature(generic_associated_types)]` to the crate attributes to enable
 
 error[E0658]: where clauses on associated types are unstable
   --> $DIR/feature-gate-generic_associated_types.rs:6:5
@@ -23,7 +23,7 @@ LL |     type Pointer2<T>: Deref<Target = T> where T: Clone, U: Clone;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44265
-   = help: add #![feature(generic_associated_types)] to the crate attributes to enable
+   = help: add `#![feature(generic_associated_types)]` to the crate attributes to enable
 
 error[E0658]: generic associated types are unstable
   --> $DIR/feature-gate-generic_associated_types.rs:14:5
@@ -32,7 +32,7 @@ LL |     type Pointer<Usize> = Box<Usize>;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44265
-   = help: add #![feature(generic_associated_types)] to the crate attributes to enable
+   = help: add `#![feature(generic_associated_types)]` to the crate attributes to enable
 
 error[E0658]: generic associated types are unstable
   --> $DIR/feature-gate-generic_associated_types.rs:16:5
@@ -41,7 +41,7 @@ LL |     type Pointer2<U32> = Box<U32>;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44265
-   = help: add #![feature(generic_associated_types)] to the crate attributes to enable
+   = help: add `#![feature(generic_associated_types)]` to the crate attributes to enable
 
 error[E0658]: where clauses on associated types are unstable
   --> $DIR/feature-gate-generic_associated_types.rs:21:5
@@ -50,7 +50,7 @@ LL |     type Assoc where Self: Sized;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44265
-   = help: add #![feature(generic_associated_types)] to the crate attributes to enable
+   = help: add `#![feature(generic_associated_types)]` to the crate attributes to enable
 
 error[E0658]: where clauses on associated types are unstable
   --> $DIR/feature-gate-generic_associated_types.rs:26:5
@@ -59,7 +59,7 @@ LL |     type Assoc where Self: Sized = Foo;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44265
-   = help: add #![feature(generic_associated_types)] to the crate attributes to enable
+   = help: add `#![feature(generic_associated_types)]` to the crate attributes to enable
 
 error: aborting due to 7 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-global_asm.stderr b/src/test/ui/feature-gates/feature-gate-global_asm.stderr
index c65f8d87a6a..416078489f1 100644
--- a/src/test/ui/feature-gates/feature-gate-global_asm.stderr
+++ b/src/test/ui/feature-gates/feature-gate-global_asm.stderr
@@ -5,7 +5,7 @@ LL | global_asm!("");
    | ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/35119
-   = help: add #![feature(global_asm)] to the crate attributes to enable
+   = help: add `#![feature(global_asm)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-intrinsics.stderr b/src/test/ui/feature-gates/feature-gate-intrinsics.stderr
index 372af6ad921..09843f05af1 100644
--- a/src/test/ui/feature-gates/feature-gate-intrinsics.stderr
+++ b/src/test/ui/feature-gates/feature-gate-intrinsics.stderr
@@ -6,7 +6,7 @@ LL | |     fn bar();
 LL | | }
    | |_^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error[E0658]: intrinsics are subject to change
   --> $DIR/feature-gate-intrinsics.rs:5:1
@@ -14,7 +14,7 @@ error[E0658]: intrinsics are subject to change
 LL | extern "rust-intrinsic" fn baz() {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(intrinsics)]` to the crate attributes to enable
 
 error[E0093]: unrecognized intrinsic function: `bar`
   --> $DIR/feature-gate-intrinsics.rs:2:5
diff --git a/src/test/ui/feature-gates/feature-gate-is_sorted.stderr b/src/test/ui/feature-gates/feature-gate-is_sorted.stderr
index 1d5998641be..11b2b3e740a 100644
--- a/src/test/ui/feature-gates/feature-gate-is_sorted.stderr
+++ b/src/test/ui/feature-gates/feature-gate-is_sorted.stderr
@@ -5,7 +5,7 @@ LL |     assert!([1, 2, 2, 9].iter().is_sorted());
    |                                 ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53485
-   = help: add #![feature(is_sorted)] to the crate attributes to enable
+   = help: add `#![feature(is_sorted)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'is_sorted': new API
   --> $DIR/feature-gate-is_sorted.rs:5:39
@@ -14,7 +14,7 @@ LL |     assert!(![-2i32, -1, 0, 3].iter().is_sorted_by_key(|n| n.abs()));
    |                                       ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53485
-   = help: add #![feature(is_sorted)] to the crate attributes to enable
+   = help: add `#![feature(is_sorted)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'is_sorted': new API
   --> $DIR/feature-gate-is_sorted.rs:9:26
@@ -23,7 +23,7 @@ LL |     assert!([1, 2, 2, 9].is_sorted());
    |                          ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53485
-   = help: add #![feature(is_sorted)] to the crate attributes to enable
+   = help: add `#![feature(is_sorted)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'is_sorted': new API
   --> $DIR/feature-gate-is_sorted.rs:11:32
@@ -32,7 +32,7 @@ LL |     assert!(![-2i32, -1, 0, 3].is_sorted_by_key(|n| n.abs()));
    |                                ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53485
-   = help: add #![feature(is_sorted)] to the crate attributes to enable
+   = help: add `#![feature(is_sorted)]` to the crate attributes to enable
 
 error: aborting due to 4 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-label_break_value.stderr b/src/test/ui/feature-gates/feature-gate-label_break_value.stderr
index 40efc4dec4b..a417e0eec22 100644
--- a/src/test/ui/feature-gates/feature-gate-label_break_value.stderr
+++ b/src/test/ui/feature-gates/feature-gate-label_break_value.stderr
@@ -5,7 +5,7 @@ LL |     'a: {
    |     ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/48594
-   = help: add #![feature(label_break_value)] to the crate attributes to enable
+   = help: add `#![feature(label_break_value)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-lang-items.stderr b/src/test/ui/feature-gates/feature-gate-lang-items.stderr
index 8fc1197ddfe..c2496863fea 100644
--- a/src/test/ui/feature-gates/feature-gate-lang-items.stderr
+++ b/src/test/ui/feature-gates/feature-gate-lang-items.stderr
@@ -4,7 +4,7 @@ error[E0658]: language items are subject to change
 LL | #[lang = "foo"]
    | ^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(lang_items)] to the crate attributes to enable
+   = help: add `#![feature(lang_items)]` to the crate attributes to enable
 
 error[E0522]: definition of an unknown language item: `foo`
   --> $DIR/feature-gate-lang-items.rs:1:1
diff --git a/src/test/ui/feature-gates/feature-gate-link_args.stderr b/src/test/ui/feature-gates/feature-gate-link_args.stderr
index 5267b56253f..bd690b3f89b 100644
--- a/src/test/ui/feature-gates/feature-gate-link_args.stderr
+++ b/src/test/ui/feature-gates/feature-gate-link_args.stderr
@@ -5,7 +5,7 @@ LL | #[link_args = "-l expected_use_case"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29596
-   = help: add #![feature(link_args)] to the crate attributes to enable
+   = help: add `#![feature(link_args)]` to the crate attributes to enable
 
 error[E0658]: the `link_args` attribute is experimental and not portable across platforms, it is recommended to use `#[link(name = "foo")] instead
   --> $DIR/feature-gate-link_args.rs:16:1
@@ -14,7 +14,7 @@ LL | #[link_args = "-l unexected_use_on_non_extern_item"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29596
-   = help: add #![feature(link_args)] to the crate attributes to enable
+   = help: add `#![feature(link_args)]` to the crate attributes to enable
 
 error[E0658]: the `link_args` attribute is experimental and not portable across platforms, it is recommended to use `#[link(name = "foo")] instead
   --> $DIR/feature-gate-link_args.rs:9:1
@@ -23,7 +23,7 @@ LL | #![link_args = "-l unexpected_use_as_inner_attr_on_mod"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29596
-   = help: add #![feature(link_args)] to the crate attributes to enable
+   = help: add `#![feature(link_args)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-link_cfg.stderr b/src/test/ui/feature-gates/feature-gate-link_cfg.stderr
index 1648245d0b8..58aa4ed7497 100644
--- a/src/test/ui/feature-gates/feature-gate-link_cfg.stderr
+++ b/src/test/ui/feature-gates/feature-gate-link_cfg.stderr
@@ -5,7 +5,7 @@ LL | #[link(name = "foo", cfg(foo))]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/37406
-   = help: add #![feature(link_cfg)] to the crate attributes to enable
+   = help: add `#![feature(link_cfg)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-link_llvm_intrinsics.stderr b/src/test/ui/feature-gates/feature-gate-link_llvm_intrinsics.stderr
index 903696dc7c2..6c8e76d2693 100644
--- a/src/test/ui/feature-gates/feature-gate-link_llvm_intrinsics.stderr
+++ b/src/test/ui/feature-gates/feature-gate-link_llvm_intrinsics.stderr
@@ -5,7 +5,7 @@ LL |     fn sqrt(x: f32) -> f32;
    |     ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29602
-   = help: add #![feature(link_llvm_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(link_llvm_intrinsics)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-linkage.stderr b/src/test/ui/feature-gates/feature-gate-linkage.stderr
index 872c695120a..d3f2aa6ba8b 100644
--- a/src/test/ui/feature-gates/feature-gate-linkage.stderr
+++ b/src/test/ui/feature-gates/feature-gate-linkage.stderr
@@ -5,7 +5,7 @@ LL |     #[linkage = "extern_weak"] static foo: isize;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29603
-   = help: add #![feature(linkage)] to the crate attributes to enable
+   = help: add `#![feature(linkage)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-lint-reasons.stderr b/src/test/ui/feature-gates/feature-gate-lint-reasons.stderr
index 9e814a20d6d..390a1bf580f 100644
--- a/src/test/ui/feature-gates/feature-gate-lint-reasons.stderr
+++ b/src/test/ui/feature-gates/feature-gate-lint-reasons.stderr
@@ -5,7 +5,7 @@ LL | #![warn(nonstandard_style, reason = "the standard should be respected")]
    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54503
-   = help: add #![feature(lint_reasons)] to the crate attributes to enable
+   = help: add `#![feature(lint_reasons)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-log_syntax.stderr b/src/test/ui/feature-gates/feature-gate-log_syntax.stderr
index f6a07616c53..58f522cf823 100644
--- a/src/test/ui/feature-gates/feature-gate-log_syntax.stderr
+++ b/src/test/ui/feature-gates/feature-gate-log_syntax.stderr
@@ -5,7 +5,7 @@ LL |     log_syntax!()
    |     ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29598
-   = help: add #![feature(log_syntax)] to the crate attributes to enable
+   = help: add `#![feature(log_syntax)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-log_syntax2.stderr b/src/test/ui/feature-gates/feature-gate-log_syntax2.stderr
index cfc2beb8087..3228b9c3013 100644
--- a/src/test/ui/feature-gates/feature-gate-log_syntax2.stderr
+++ b/src/test/ui/feature-gates/feature-gate-log_syntax2.stderr
@@ -5,7 +5,7 @@ LL |     println!("{:?}", log_syntax!());
    |                      ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29598
-   = help: add #![feature(log_syntax)] to the crate attributes to enable
+   = help: add `#![feature(log_syntax)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-macros_in_extern.stderr b/src/test/ui/feature-gates/feature-gate-macros_in_extern.stderr
index 891ed81107f..e8b3ab5dda2 100644
--- a/src/test/ui/feature-gates/feature-gate-macros_in_extern.stderr
+++ b/src/test/ui/feature-gates/feature-gate-macros_in_extern.stderr
@@ -5,7 +5,7 @@ LL |     returns_isize!(rust_get_test_int);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49476
-   = help: add #![feature(macros_in_extern)] to the crate attributes to enable
+   = help: add `#![feature(macros_in_extern)]` to the crate attributes to enable
 
 error[E0658]: macro invocations in `extern {}` blocks are experimental
   --> $DIR/feature-gate-macros_in_extern.rs:21:5
@@ -14,7 +14,7 @@ LL |     takes_u32_returns_u32!(rust_dbg_extern_identity_u32);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49476
-   = help: add #![feature(macros_in_extern)] to the crate attributes to enable
+   = help: add `#![feature(macros_in_extern)]` to the crate attributes to enable
 
 error[E0658]: macro invocations in `extern {}` blocks are experimental
   --> $DIR/feature-gate-macros_in_extern.rs:23:5
@@ -23,7 +23,7 @@ LL |     emits_nothing!();
    |     ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49476
-   = help: add #![feature(macros_in_extern)] to the crate attributes to enable
+   = help: add `#![feature(macros_in_extern)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-main.rs b/src/test/ui/feature-gates/feature-gate-main.rs
index 681bdca3925..9c304a1792f 100644
--- a/src/test/ui/feature-gates/feature-gate-main.rs
+++ b/src/test/ui/feature-gates/feature-gate-main.rs
@@ -1,2 +1,2 @@
 #[main]
-fn foo() {} //~ ERROR: declaration of a nonstandard #[main] function may change over time
+fn foo() {} //~ ERROR: declaration of a non-standard `#[main]` function may change over time
diff --git a/src/test/ui/feature-gates/feature-gate-main.stderr b/src/test/ui/feature-gates/feature-gate-main.stderr
index 4d2d01b49f3..513758e0309 100644
--- a/src/test/ui/feature-gates/feature-gate-main.stderr
+++ b/src/test/ui/feature-gates/feature-gate-main.stderr
@@ -1,11 +1,11 @@
-error[E0658]: declaration of a nonstandard #[main] function may change over time, for now a top-level `fn main()` is required
+error[E0658]: declaration of a non-standard `#[main]` function may change over time, for now a top-level `fn main()` is required
   --> $DIR/feature-gate-main.rs:2:1
    |
 LL | fn foo() {}
    | ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29634
-   = help: add #![feature(main)] to the crate attributes to enable
+   = help: add `#![feature(main)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-marker_trait_attr.stderr b/src/test/ui/feature-gates/feature-gate-marker_trait_attr.stderr
index 3ed43b52e56..94dfaf9206d 100644
--- a/src/test/ui/feature-gates/feature-gate-marker_trait_attr.stderr
+++ b/src/test/ui/feature-gates/feature-gate-marker_trait_attr.stderr
@@ -5,7 +5,7 @@ LL | #[marker] trait ExplicitMarker {}
    | ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29864
-   = help: add #![feature(marker_trait_attr)] to the crate attributes to enable
+   = help: add `#![feature(marker_trait_attr)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-may-dangle.stderr b/src/test/ui/feature-gates/feature-gate-may-dangle.stderr
index f93be3ed4e7..c47bb75e6bc 100644
--- a/src/test/ui/feature-gates/feature-gate-may-dangle.stderr
+++ b/src/test/ui/feature-gates/feature-gate-may-dangle.stderr
@@ -5,7 +5,7 @@ LL | unsafe impl<#[may_dangle] A> Drop for Pt<A> {
    |             ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/34761
-   = help: add #![feature(dropck_eyepatch)] to the crate attributes to enable
+   = help: add `#![feature(dropck_eyepatch)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-min_const_fn.stderr b/src/test/ui/feature-gates/feature-gate-min_const_fn.stderr
index f5155b424b5..98c9e2b0c9f 100644
--- a/src/test/ui/feature-gates/feature-gate-min_const_fn.stderr
+++ b/src/test/ui/feature-gates/feature-gate-min_const_fn.stderr
@@ -23,7 +23,7 @@ LL |     const fn foo() -> u32;
    |     ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error[E0658]: const fn is unstable
   --> $DIR/feature-gate-min_const_fn.rs:8:5
@@ -32,7 +32,7 @@ LL |     const fn bar() -> u32 { 0 }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error: aborting due to 5 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-naked_functions.stderr b/src/test/ui/feature-gates/feature-gate-naked_functions.stderr
index 0ba4d551a6d..d4041f4ecd8 100644
--- a/src/test/ui/feature-gates/feature-gate-naked_functions.stderr
+++ b/src/test/ui/feature-gates/feature-gate-naked_functions.stderr
@@ -5,7 +5,7 @@ LL | #[naked]
    | ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32408
-   = help: add #![feature(naked_functions)] to the crate attributes to enable
+   = help: add `#![feature(naked_functions)]` to the crate attributes to enable
 
 error[E0658]: the `#[naked]` attribute is an experimental feature
   --> $DIR/feature-gate-naked_functions.rs:5:1
@@ -14,7 +14,7 @@ LL | #[naked]
    | ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32408
-   = help: add #![feature(naked_functions)] to the crate attributes to enable
+   = help: add `#![feature(naked_functions)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-needs-allocator.stderr b/src/test/ui/feature-gates/feature-gate-needs-allocator.stderr
index 012664e9b6b..2b213acebb5 100644
--- a/src/test/ui/feature-gates/feature-gate-needs-allocator.stderr
+++ b/src/test/ui/feature-gates/feature-gate-needs-allocator.stderr
@@ -4,7 +4,7 @@ error[E0658]: the `#[needs_allocator]` attribute is an experimental feature
 LL | #![needs_allocator]
    | ^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(allocator_internals)] to the crate attributes to enable
+   = help: add `#![feature(allocator_internals)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-never_type.stderr b/src/test/ui/feature-gates/feature-gate-never_type.stderr
index 45a6e6de18b..d86ab99b82b 100644
--- a/src/test/ui/feature-gates/feature-gate-never_type.stderr
+++ b/src/test/ui/feature-gates/feature-gate-never_type.stderr
@@ -5,7 +5,7 @@ LL | type Ma = (u32, !, i32);
    |                 ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/35121
-   = help: add #![feature(never_type)] to the crate attributes to enable
+   = help: add `#![feature(never_type)]` to the crate attributes to enable
 
 error[E0658]: The `!` type is experimental
   --> $DIR/feature-gate-never_type.rs:8:20
@@ -14,7 +14,7 @@ LL | type Meeshka = Vec<!>;
    |                    ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/35121
-   = help: add #![feature(never_type)] to the crate attributes to enable
+   = help: add `#![feature(never_type)]` to the crate attributes to enable
 
 error[E0658]: The `!` type is experimental
   --> $DIR/feature-gate-never_type.rs:9:24
@@ -23,7 +23,7 @@ LL | type Mow = &'static fn(!) -> !;
    |                        ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/35121
-   = help: add #![feature(never_type)] to the crate attributes to enable
+   = help: add `#![feature(never_type)]` to the crate attributes to enable
 
 error[E0658]: The `!` type is experimental
   --> $DIR/feature-gate-never_type.rs:10:27
@@ -32,7 +32,7 @@ LL | type Skwoz = &'static mut !;
    |                           ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/35121
-   = help: add #![feature(never_type)] to the crate attributes to enable
+   = help: add `#![feature(never_type)]` to the crate attributes to enable
 
 error[E0658]: The `!` type is experimental
   --> $DIR/feature-gate-never_type.rs:13:16
@@ -41,7 +41,7 @@ LL |     type Wub = !;
    |                ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/35121
-   = help: add #![feature(never_type)] to the crate attributes to enable
+   = help: add `#![feature(never_type)]` to the crate attributes to enable
 
 error: aborting due to 5 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-no-debug.stderr b/src/test/ui/feature-gates/feature-gate-no-debug.stderr
index a58a75b70c5..7d5af0802c4 100644
--- a/src/test/ui/feature-gates/feature-gate-no-debug.stderr
+++ b/src/test/ui/feature-gates/feature-gate-no-debug.stderr
@@ -5,7 +5,7 @@ LL | #[no_debug]
    | ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29721
-   = help: add #![feature(no_debug)] to the crate attributes to enable
+   = help: add `#![feature(no_debug)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-no_core.stderr b/src/test/ui/feature-gates/feature-gate-no_core.stderr
index e2f0fd68a7c..4d4ca96544e 100644
--- a/src/test/ui/feature-gates/feature-gate-no_core.stderr
+++ b/src/test/ui/feature-gates/feature-gate-no_core.stderr
@@ -5,7 +5,7 @@ LL | #![no_core]
    | ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29639
-   = help: add #![feature(no_core)] to the crate attributes to enable
+   = help: add `#![feature(no_core)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-non_ascii_idents.stderr b/src/test/ui/feature-gates/feature-gate-non_ascii_idents.stderr
index 1d78b87a3e0..02d21c90fe7 100644
--- a/src/test/ui/feature-gates/feature-gate-non_ascii_idents.stderr
+++ b/src/test/ui/feature-gates/feature-gate-non_ascii_idents.stderr
@@ -5,7 +5,7 @@ LL | extern crate core as bäz;
    |                      ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:3:5
@@ -14,7 +14,7 @@ LL | use föö::bar;
    |     ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:5:5
@@ -23,7 +23,7 @@ LL | mod föö {
    |     ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:9:4
@@ -32,7 +32,7 @@ LL | fn bär(
    |    ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:10:5
@@ -41,7 +41,7 @@ LL |     bäz: isize
    |     ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:12:9
@@ -50,7 +50,7 @@ LL |     let _ö: isize;
    |         ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:15:10
@@ -59,7 +59,7 @@ LL |         (_ä, _) => {}
    |          ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:19:8
@@ -68,7 +68,7 @@ LL | struct Föö {
    |        ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:20:5
@@ -77,7 +77,7 @@ LL |     föö: isize
    |     ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:23:6
@@ -86,7 +86,7 @@ LL | enum Bär {
    |      ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:24:5
@@ -95,7 +95,7 @@ LL |     Bäz {
    |     ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:25:9
@@ -104,7 +104,7 @@ LL |         qüx: isize
    |         ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/feature-gate-non_ascii_idents.rs:30:8
@@ -113,7 +113,7 @@ LL |     fn qüx();
    |        ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error: aborting due to 13 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-non_exhaustive.stderr b/src/test/ui/feature-gates/feature-gate-non_exhaustive.stderr
index fdb1ffb0a9b..8a01aa9eb6a 100644
--- a/src/test/ui/feature-gates/feature-gate-non_exhaustive.stderr
+++ b/src/test/ui/feature-gates/feature-gate-non_exhaustive.stderr
@@ -5,7 +5,7 @@ LL | #[non_exhaustive]
    | ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44109
-   = help: add #![feature(non_exhaustive)] to the crate attributes to enable
+   = help: add `#![feature(non_exhaustive)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-omit-gdb-pretty-printer-section.stderr b/src/test/ui/feature-gates/feature-gate-omit-gdb-pretty-printer-section.stderr
index 683424899a2..a5ec3599f6a 100644
--- a/src/test/ui/feature-gates/feature-gate-omit-gdb-pretty-printer-section.stderr
+++ b/src/test/ui/feature-gates/feature-gate-omit-gdb-pretty-printer-section.stderr
@@ -4,7 +4,7 @@ error[E0658]: the `#[omit_gdb_pretty_printer_section]` attribute is just used fo
 LL | #[omit_gdb_pretty_printer_section]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(omit_gdb_pretty_printer_section)] to the crate attributes to enable
+   = help: add `#![feature(omit_gdb_pretty_printer_section)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-on-unimplemented.stderr b/src/test/ui/feature-gates/feature-gate-on-unimplemented.stderr
index 044a9a398d6..6c230f8cada 100644
--- a/src/test/ui/feature-gates/feature-gate-on-unimplemented.stderr
+++ b/src/test/ui/feature-gates/feature-gate-on-unimplemented.stderr
@@ -5,7 +5,7 @@ LL | #[rustc_on_unimplemented = "test error `{Self}` with `{Bar}`"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29628
-   = help: add #![feature(on_unimplemented)] to the crate attributes to enable
+   = help: add `#![feature(on_unimplemented)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-optin-builtin-traits.stderr b/src/test/ui/feature-gates/feature-gate-optin-builtin-traits.stderr
index baad1627d9c..0c3dd451b27 100644
--- a/src/test/ui/feature-gates/feature-gate-optin-builtin-traits.stderr
+++ b/src/test/ui/feature-gates/feature-gate-optin-builtin-traits.stderr
@@ -5,7 +5,7 @@ LL | auto trait AutoDummyTrait {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/13231
-   = help: add #![feature(optin_builtin_traits)] to the crate attributes to enable
+   = help: add `#![feature(optin_builtin_traits)]` to the crate attributes to enable
 
 error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
   --> $DIR/feature-gate-optin-builtin-traits.rs:9:1
@@ -14,7 +14,7 @@ LL | impl !AutoDummyTrait for DummyStruct {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/13231
-   = help: add #![feature(optin_builtin_traits)] to the crate attributes to enable
+   = help: add `#![feature(optin_builtin_traits)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-plugin.stderr b/src/test/ui/feature-gates/feature-gate-plugin.stderr
index 5ac41201888..0da9653c9af 100644
--- a/src/test/ui/feature-gates/feature-gate-plugin.stderr
+++ b/src/test/ui/feature-gates/feature-gate-plugin.stderr
@@ -5,7 +5,7 @@ LL | #![plugin(foo)]
    | ^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29597
-   = help: add #![feature(plugin)] to the crate attributes to enable
+   = help: add `#![feature(plugin)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-plugin_registrar.stderr b/src/test/ui/feature-gates/feature-gate-plugin_registrar.stderr
index 941a6c49d15..93473bfd27b 100644
--- a/src/test/ui/feature-gates/feature-gate-plugin_registrar.stderr
+++ b/src/test/ui/feature-gates/feature-gate-plugin_registrar.stderr
@@ -5,7 +5,7 @@ LL | pub fn registrar() {}
    | ^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29597
-   = help: add #![feature(plugin_registrar)] to the crate attributes to enable
+   = help: add `#![feature(plugin_registrar)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-prelude_import.stderr b/src/test/ui/feature-gates/feature-gate-prelude_import.stderr
index 7501954f904..8686aed8f82 100644
--- a/src/test/ui/feature-gates/feature-gate-prelude_import.stderr
+++ b/src/test/ui/feature-gates/feature-gate-prelude_import.stderr
@@ -4,7 +4,7 @@ error[E0658]: `#[prelude_import]` is for use by rustc only
 LL | #[prelude_import]
    | ^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(prelude_import)] to the crate attributes to enable
+   = help: add `#![feature(prelude_import)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-profiler-runtime.stderr b/src/test/ui/feature-gates/feature-gate-profiler-runtime.stderr
index 1f335401f99..18e6503c552 100644
--- a/src/test/ui/feature-gates/feature-gate-profiler-runtime.stderr
+++ b/src/test/ui/feature-gates/feature-gate-profiler-runtime.stderr
@@ -4,7 +4,7 @@ error[E0658]: the `#[profiler_runtime]` attribute is used to identify the `profi
 LL | #![profiler_runtime]
    | ^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(profiler_runtime)] to the crate attributes to enable
+   = help: add `#![feature(profiler_runtime)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-repr-simd.stderr b/src/test/ui/feature-gates/feature-gate-repr-simd.stderr
index fd3176e5737..dfaa85bc5f0 100644
--- a/src/test/ui/feature-gates/feature-gate-repr-simd.stderr
+++ b/src/test/ui/feature-gates/feature-gate-repr-simd.stderr
@@ -5,7 +5,7 @@ LL | #[repr(simd)]
    | ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(repr_simd)] to the crate attributes to enable
+   = help: add `#![feature(repr_simd)]` to the crate attributes to enable
 
 error[E0658]: SIMD types are experimental and possibly buggy
   --> $DIR/feature-gate-repr-simd.rs:5:1
@@ -14,7 +14,7 @@ LL | #[repr(simd)]
    | ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(repr_simd)] to the crate attributes to enable
+   = help: add `#![feature(repr_simd)]` to the crate attributes to enable
 
 warning[E0566]: conflicting representation hints
   --> $DIR/feature-gate-repr-simd.rs:4:8
diff --git a/src/test/ui/feature-gates/feature-gate-repr128.stderr b/src/test/ui/feature-gates/feature-gate-repr128.stderr
index 30433447a2b..2139a5da600 100644
--- a/src/test/ui/feature-gates/feature-gate-repr128.stderr
+++ b/src/test/ui/feature-gates/feature-gate-repr128.stderr
@@ -7,7 +7,7 @@ LL | | }
    | |_^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/35118
-   = help: add #![feature(repr128)] to the crate attributes to enable
+   = help: add `#![feature(repr128)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-rustc-attrs-1.stderr b/src/test/ui/feature-gates/feature-gate-rustc-attrs-1.stderr
index ed98484e13c..e9dd0867fca 100644
--- a/src/test/ui/feature-gates/feature-gate-rustc-attrs-1.stderr
+++ b/src/test/ui/feature-gates/feature-gate-rustc-attrs-1.stderr
@@ -5,7 +5,7 @@ LL | #[rustc_variance]
    | ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error[E0658]: the `#[rustc_error]` attribute is just used for rustc unit tests and will never be stable
   --> $DIR/feature-gate-rustc-attrs-1.rs:6:1
@@ -14,7 +14,7 @@ LL | #[rustc_error]
    | ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error[E0658]: the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to enable niche optimizations in libcore and will never be stable
   --> $DIR/feature-gate-rustc-attrs-1.rs:7:1
@@ -23,7 +23,7 @@ LL | #[rustc_nonnull_optimization_guaranteed]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-rustc-attrs.stderr b/src/test/ui/feature-gates/feature-gate-rustc-attrs.stderr
index cdc7b27a749..f098635c702 100644
--- a/src/test/ui/feature-gates/feature-gate-rustc-attrs.stderr
+++ b/src/test/ui/feature-gates/feature-gate-rustc-attrs.stderr
@@ -5,7 +5,7 @@ LL | #[rustc::unknown]
    |   ^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: macro `rustc::unknown` may not be used in attributes
   --> $DIR/feature-gate-rustc-attrs.rs:8:1
@@ -20,7 +20,7 @@ LL | #[unknown::rustc]
    |            ^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: macro `unknown::rustc` may not be used in attributes
   --> $DIR/feature-gate-rustc-attrs.rs:13:1
@@ -35,7 +35,7 @@ LL | #[rustc_unknown]
    |   ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error[E0658]: The attribute `rustc_unknown` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/feature-gate-rustc-attrs.rs:20:3
@@ -44,7 +44,7 @@ LL | #[rustc_unknown]
    |   ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: used by the test suite
   --> $DIR/feature-gate-rustc-attrs.rs:18:1
@@ -53,7 +53,7 @@ LL | #[rustc_dummy]
    | ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: aborting due to 7 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-rustc_const_unstable.stderr b/src/test/ui/feature-gates/feature-gate-rustc_const_unstable.stderr
index 8f584c333ac..d7b7cf72a26 100644
--- a/src/test/ui/feature-gates/feature-gate-rustc_const_unstable.stderr
+++ b/src/test/ui/feature-gates/feature-gate-rustc_const_unstable.stderr
@@ -4,7 +4,7 @@ error[E0658]: the `#[rustc_const_unstable]` attribute is an internal feature
 LL | #[rustc_const_unstable(feature="fzzzzzt")]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(rustc_const_unstable)] to the crate attributes to enable
+   = help: add `#![feature(rustc_const_unstable)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-sanitizer-runtime.stderr b/src/test/ui/feature-gates/feature-gate-sanitizer-runtime.stderr
index 71d9890cb2c..b13ec215f8c 100644
--- a/src/test/ui/feature-gates/feature-gate-sanitizer-runtime.stderr
+++ b/src/test/ui/feature-gates/feature-gate-sanitizer-runtime.stderr
@@ -4,7 +4,7 @@ error[E0658]: the `#[sanitizer_runtime]` attribute is used to identify crates th
 LL | #![sanitizer_runtime]
    | ^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(sanitizer_runtime)] to the crate attributes to enable
+   = help: add `#![feature(sanitizer_runtime)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-simd.stderr b/src/test/ui/feature-gates/feature-gate-simd.stderr
index 1686a8530fe..b72ac1e4936 100644
--- a/src/test/ui/feature-gates/feature-gate-simd.stderr
+++ b/src/test/ui/feature-gates/feature-gate-simd.stderr
@@ -5,7 +5,7 @@ LL | #[repr(simd)]
    | ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(repr_simd)] to the crate attributes to enable
+   = help: add `#![feature(repr_simd)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-slice-patterns.stderr b/src/test/ui/feature-gates/feature-gate-slice-patterns.stderr
index 03bf933cd08..e88fddaa81f 100644
--- a/src/test/ui/feature-gates/feature-gate-slice-patterns.stderr
+++ b/src/test/ui/feature-gates/feature-gate-slice-patterns.stderr
@@ -5,7 +5,7 @@ LL |         [1, 2, ..] => {}
    |                ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/62254
-   = help: add #![feature(slice_patterns)] to the crate attributes to enable
+   = help: add `#![feature(slice_patterns)]` to the crate attributes to enable
 
 error[E0658]: syntax for subslices in slice patterns is not yet stabilized
   --> $DIR/feature-gate-slice-patterns.rs:7:13
@@ -14,7 +14,7 @@ LL |         [1, .., 5] => {}
    |             ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/62254
-   = help: add #![feature(slice_patterns)] to the crate attributes to enable
+   = help: add `#![feature(slice_patterns)]` to the crate attributes to enable
 
 error[E0658]: syntax for subslices in slice patterns is not yet stabilized
   --> $DIR/feature-gate-slice-patterns.rs:8:10
@@ -23,7 +23,7 @@ LL |         [.., 4, 5] => {}
    |          ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/62254
-   = help: add #![feature(slice_patterns)] to the crate attributes to enable
+   = help: add `#![feature(slice_patterns)]` to the crate attributes to enable
 
 error[E0658]: syntax for subslices in slice patterns is not yet stabilized
   --> $DIR/feature-gate-slice-patterns.rs:13:11
@@ -32,7 +32,7 @@ LL |         [ xs.., 4, 5 ] => {}
    |           ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/62254
-   = help: add #![feature(slice_patterns)] to the crate attributes to enable
+   = help: add `#![feature(slice_patterns)]` to the crate attributes to enable
 
 error[E0658]: syntax for subslices in slice patterns is not yet stabilized
   --> $DIR/feature-gate-slice-patterns.rs:14:14
@@ -41,7 +41,7 @@ LL |         [ 1, xs.., 5 ] => {}
    |              ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/62254
-   = help: add #![feature(slice_patterns)] to the crate attributes to enable
+   = help: add `#![feature(slice_patterns)]` to the crate attributes to enable
 
 error[E0658]: syntax for subslices in slice patterns is not yet stabilized
   --> $DIR/feature-gate-slice-patterns.rs:15:17
@@ -50,7 +50,7 @@ LL |         [ 1, 2, xs.. ] => {}
    |                 ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/62254
-   = help: add #![feature(slice_patterns)] to the crate attributes to enable
+   = help: add `#![feature(slice_patterns)]` to the crate attributes to enable
 
 error: aborting due to 6 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-start.rs b/src/test/ui/feature-gates/feature-gate-start.rs
index 46a1279a3fb..0bd4c7c85b7 100644
--- a/src/test/ui/feature-gates/feature-gate-start.rs
+++ b/src/test/ui/feature-gates/feature-gate-start.rs
@@ -1,3 +1,3 @@
 #[start]
 fn foo(_: isize, _: *const *const u8) -> isize { 0 }
-//~^ ERROR a #[start] function is an experimental feature
+//~^ ERROR a `#[start]` function is an experimental feature
diff --git a/src/test/ui/feature-gates/feature-gate-start.stderr b/src/test/ui/feature-gates/feature-gate-start.stderr
index fbe64ea130d..c769ef8ee92 100644
--- a/src/test/ui/feature-gates/feature-gate-start.stderr
+++ b/src/test/ui/feature-gates/feature-gate-start.stderr
@@ -1,11 +1,11 @@
-error[E0658]: a #[start] function is an experimental feature whose signature may change over time
+error[E0658]: a `#[start]` function is an experimental feature whose signature may change over time
   --> $DIR/feature-gate-start.rs:2:1
    |
 LL | fn foo(_: isize, _: *const *const u8) -> isize { 0 }
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29633
-   = help: add #![feature(start)] to the crate attributes to enable
+   = help: add `#![feature(start)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-static-nobundle.stderr b/src/test/ui/feature-gates/feature-gate-static-nobundle.stderr
index 7d5ed74abd1..f2e29cf0678 100644
--- a/src/test/ui/feature-gates/feature-gate-static-nobundle.stderr
+++ b/src/test/ui/feature-gates/feature-gate-static-nobundle.stderr
@@ -5,7 +5,7 @@ LL | #[link(name="foo", kind="static-nobundle")]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/37403
-   = help: add #![feature(static_nobundle)] to the crate attributes to enable
+   = help: add `#![feature(static_nobundle)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-stmt_expr_attributes.stderr b/src/test/ui/feature-gates/feature-gate-stmt_expr_attributes.stderr
index bbf0f66ca54..70c70638ea9 100644
--- a/src/test/ui/feature-gates/feature-gate-stmt_expr_attributes.stderr
+++ b/src/test/ui/feature-gates/feature-gate-stmt_expr_attributes.stderr
@@ -5,7 +5,7 @@ LL | const X: i32 = #[allow(dead_code)] 8;
    |                ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-thread_local.stderr b/src/test/ui/feature-gates/feature-gate-thread_local.stderr
index 95334d23d51..9f154d9bc50 100644
--- a/src/test/ui/feature-gates/feature-gate-thread_local.stderr
+++ b/src/test/ui/feature-gates/feature-gate-thread_local.stderr
@@ -5,7 +5,7 @@ LL | #[thread_local]
    | ^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29594
-   = help: add #![feature(thread_local)] to the crate attributes to enable
+   = help: add `#![feature(thread_local)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-trace_macros.stderr b/src/test/ui/feature-gates/feature-gate-trace_macros.stderr
index e08b173ae84..eb41ee45d22 100644
--- a/src/test/ui/feature-gates/feature-gate-trace_macros.stderr
+++ b/src/test/ui/feature-gates/feature-gate-trace_macros.stderr
@@ -5,7 +5,7 @@ LL |     trace_macros!(true);
    |     ^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29598
-   = help: add #![feature(trace_macros)] to the crate attributes to enable
+   = help: add `#![feature(trace_macros)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-trait-alias.stderr b/src/test/ui/feature-gates/feature-gate-trait-alias.stderr
index 1a9718a6ce4..9250e27d158 100644
--- a/src/test/ui/feature-gates/feature-gate-trait-alias.stderr
+++ b/src/test/ui/feature-gates/feature-gate-trait-alias.stderr
@@ -5,7 +5,7 @@ LL | trait Foo = Default;
    | ^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/41517
-   = help: add #![feature(trait_alias)] to the crate attributes to enable
+   = help: add `#![feature(trait_alias)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-transparent_enums.stderr b/src/test/ui/feature-gates/feature-gate-transparent_enums.stderr
index 8ba079b89f5..8e727c33f20 100644
--- a/src/test/ui/feature-gates/feature-gate-transparent_enums.stderr
+++ b/src/test/ui/feature-gates/feature-gate-transparent_enums.stderr
@@ -5,7 +5,7 @@ LL | enum OkButUnstableEnum {
    | ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60405
-   = help: add #![feature(transparent_enums)] to the crate attributes to enable
+   = help: add `#![feature(transparent_enums)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-transparent_unions.stderr b/src/test/ui/feature-gates/feature-gate-transparent_unions.stderr
index 341324c3d67..356950d0641 100644
--- a/src/test/ui/feature-gates/feature-gate-transparent_unions.stderr
+++ b/src/test/ui/feature-gates/feature-gate-transparent_unions.stderr
@@ -5,7 +5,7 @@ LL | union OkButUnstableUnion {
    | ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60405
-   = help: add #![feature(transparent_unions)] to the crate attributes to enable
+   = help: add `#![feature(transparent_unions)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-try_blocks.stderr b/src/test/ui/feature-gates/feature-gate-try_blocks.stderr
index cb72b067333..565f3610a2e 100644
--- a/src/test/ui/feature-gates/feature-gate-try_blocks.stderr
+++ b/src/test/ui/feature-gates/feature-gate-try_blocks.stderr
@@ -9,7 +9,7 @@ LL | |     };
    | |_____^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/31436
-   = help: add #![feature(try_blocks)] to the crate attributes to enable
+   = help: add `#![feature(try_blocks)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-try_reserve.stderr b/src/test/ui/feature-gates/feature-gate-try_reserve.stderr
index f1d82d94a52..5bd9dffa7f0 100644
--- a/src/test/ui/feature-gates/feature-gate-try_reserve.stderr
+++ b/src/test/ui/feature-gates/feature-gate-try_reserve.stderr
@@ -5,7 +5,7 @@ LL |     v.try_reserve(10);
    |       ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/48043
-   = help: add #![feature(try_reserve)] to the crate attributes to enable
+   = help: add `#![feature(try_reserve)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-type_ascription.stderr b/src/test/ui/feature-gates/feature-gate-type_ascription.stderr
index 0e4e25882c8..83f95529f0d 100644
--- a/src/test/ui/feature-gates/feature-gate-type_ascription.stderr
+++ b/src/test/ui/feature-gates/feature-gate-type_ascription.stderr
@@ -5,7 +5,7 @@ LL |     let a = 10: u8;
    |             ^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/23416
-   = help: add #![feature(type_ascription)] to the crate attributes to enable
+   = help: add `#![feature(type_ascription)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr b/src/test/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr
index 6b09daff0f9..fc4317b316a 100644
--- a/src/test/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr
+++ b/src/test/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr
@@ -5,7 +5,7 @@ LL |     extern "rust-call" fn call(self, args: ()) -> () {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:17:5
@@ -14,7 +14,7 @@ LL |     extern "rust-call" fn call_once(self, args: ()) -> () {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:23:5
@@ -23,7 +23,7 @@ LL |     extern "rust-call" fn call_mut(&self, args: ()) -> () {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: rust-call ABI is subject to change
   --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:29:5
@@ -32,7 +32,7 @@ LL |     extern "rust-call" fn call_once(&self, args: ()) -> () {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change. Use parenthetical notation (Fn(Foo, Bar) -> Baz) instead
   --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:9:6
@@ -41,7 +41,7 @@ LL | impl Fn<()> for Foo {
    |      ^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0229]: associated type bindings are not allowed here
   --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:15:12
@@ -56,7 +56,7 @@ LL | impl FnMut<()> for Bar {
    |      ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change. Use parenthetical notation (Fn(Foo, Bar) -> Baz) instead
   --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:27:6
@@ -65,7 +65,7 @@ LL | impl FnOnce<()> for Baz {
    |      ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error: aborting due to 8 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-unboxed-closures-method-calls.stderr b/src/test/ui/feature-gates/feature-gate-unboxed-closures-method-calls.stderr
index 164368cd8ef..ee3ba665cef 100644
--- a/src/test/ui/feature-gates/feature-gate-unboxed-closures-method-calls.stderr
+++ b/src/test/ui/feature-gates/feature-gate-unboxed-closures-method-calls.stderr
@@ -5,7 +5,7 @@ LL |     f.call(());
    |       ^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(fn_traits)] to the crate attributes to enable
+   = help: add `#![feature(fn_traits)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'fn_traits'
   --> $DIR/feature-gate-unboxed-closures-method-calls.rs:5:7
@@ -14,7 +14,7 @@ LL |     f.call_mut(());
    |       ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(fn_traits)] to the crate attributes to enable
+   = help: add `#![feature(fn_traits)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'fn_traits'
   --> $DIR/feature-gate-unboxed-closures-method-calls.rs:6:7
@@ -23,7 +23,7 @@ LL |     f.call_once(());
    |       ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(fn_traits)] to the crate attributes to enable
+   = help: add `#![feature(fn_traits)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-unboxed-closures-ufcs-calls.stderr b/src/test/ui/feature-gates/feature-gate-unboxed-closures-ufcs-calls.stderr
index ff2629fe421..f7cb1ab6417 100644
--- a/src/test/ui/feature-gates/feature-gate-unboxed-closures-ufcs-calls.stderr
+++ b/src/test/ui/feature-gates/feature-gate-unboxed-closures-ufcs-calls.stderr
@@ -5,7 +5,7 @@ LL |     Fn::call(&f, ());
    |     ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(fn_traits)] to the crate attributes to enable
+   = help: add `#![feature(fn_traits)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'fn_traits'
   --> $DIR/feature-gate-unboxed-closures-ufcs-calls.rs:5:5
@@ -14,7 +14,7 @@ LL |     FnMut::call_mut(&mut f, ());
    |     ^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(fn_traits)] to the crate attributes to enable
+   = help: add `#![feature(fn_traits)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'fn_traits'
   --> $DIR/feature-gate-unboxed-closures-ufcs-calls.rs:6:5
@@ -23,7 +23,7 @@ LL |     FnOnce::call_once(f, ());
    |     ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(fn_traits)] to the crate attributes to enable
+   = help: add `#![feature(fn_traits)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-unboxed-closures.stderr b/src/test/ui/feature-gates/feature-gate-unboxed-closures.stderr
index 872a593f3e4..723c6619887 100644
--- a/src/test/ui/feature-gates/feature-gate-unboxed-closures.stderr
+++ b/src/test/ui/feature-gates/feature-gate-unboxed-closures.stderr
@@ -7,7 +7,7 @@ LL | |     }
    | |_____^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change. Use parenthetical notation (Fn(Foo, Bar) -> Baz) instead
   --> $DIR/feature-gate-unboxed-closures.rs:5:6
@@ -16,7 +16,7 @@ LL | impl FnOnce<(u32, u32)> for Test {
    |      ^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-unsized_tuple_coercion.stderr b/src/test/ui/feature-gates/feature-gate-unsized_tuple_coercion.stderr
index 5b93c889db1..d4c62399e9b 100644
--- a/src/test/ui/feature-gates/feature-gate-unsized_tuple_coercion.stderr
+++ b/src/test/ui/feature-gates/feature-gate-unsized_tuple_coercion.stderr
@@ -5,7 +5,7 @@ LL |     let _ : &(dyn Send,) = &((),);
    |                            ^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/42877
-   = help: add #![feature(unsized_tuple_coercion)] to the crate attributes to enable
+   = help: add `#![feature(unsized_tuple_coercion)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/feature-gates/feature-gate-untagged_unions.stderr b/src/test/ui/feature-gates/feature-gate-untagged_unions.stderr
index 5df3a1d699f..f59a34e2c81 100644
--- a/src/test/ui/feature-gates/feature-gate-untagged_unions.stderr
+++ b/src/test/ui/feature-gates/feature-gate-untagged_unions.stderr
@@ -7,7 +7,7 @@ LL | | }
    | |_^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32836
-   = help: add #![feature(untagged_unions)] to the crate attributes to enable
+   = help: add `#![feature(untagged_unions)]` to the crate attributes to enable
 
 error[E0658]: unions with non-`Copy` fields are unstable
   --> $DIR/feature-gate-untagged_unions.rs:13:1
@@ -18,7 +18,7 @@ LL | | }
    | |_^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32836
-   = help: add #![feature(untagged_unions)] to the crate attributes to enable
+   = help: add `#![feature(untagged_unions)]` to the crate attributes to enable
 
 error[E0658]: unions with `Drop` implementations are unstable
   --> $DIR/feature-gate-untagged_unions.rs:17:1
@@ -29,7 +29,7 @@ LL | | }
    | |_^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32836
-   = help: add #![feature(untagged_unions)] to the crate attributes to enable
+   = help: add `#![feature(untagged_unions)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/feature-gates/feature-gate-unwind-attributes.rs b/src/test/ui/feature-gates/feature-gate-unwind-attributes.rs
index e0cb9c88219..08e8ec9a56e 100644
--- a/src/test/ui/feature-gates/feature-gate-unwind-attributes.rs
+++ b/src/test/ui/feature-gates/feature-gate-unwind-attributes.rs
@@ -8,7 +8,7 @@ extern {
     fn extern_fn();
 // CHECK-NOT: Function Attrs: nounwind
 // CHECK: declare void @unwinding_extern_fn
-    #[unwind(allowed)] //~ ERROR #[unwind] is experimental
+    #[unwind(allowed)] //~ ERROR `#[unwind]` is experimental
     fn unwinding_extern_fn();
 }
 
diff --git a/src/test/ui/feature-gates/feature-gate-unwind-attributes.stderr b/src/test/ui/feature-gates/feature-gate-unwind-attributes.stderr
index bb55013d638..639b87e0162 100644
--- a/src/test/ui/feature-gates/feature-gate-unwind-attributes.stderr
+++ b/src/test/ui/feature-gates/feature-gate-unwind-attributes.stderr
@@ -1,11 +1,11 @@
-error[E0658]: #[unwind] is experimental
+error[E0658]: `#[unwind]` is experimental
   --> $DIR/feature-gate-unwind-attributes.rs:11:5
    |
 LL |     #[unwind(allowed)]
    |     ^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/58760
-   = help: add #![feature(unwind_attributes)] to the crate attributes to enable
+   = help: add `#![feature(unwind_attributes)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/imports/local-modularized-tricky-fail-2.stderr b/src/test/ui/imports/local-modularized-tricky-fail-2.stderr
index 70d197994f3..92a836cadfa 100644
--- a/src/test/ui/imports/local-modularized-tricky-fail-2.stderr
+++ b/src/test/ui/imports/local-modularized-tricky-fail-2.stderr
@@ -8,7 +8,7 @@ LL |                 () => ( struct Б; )
    |                                ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/local-modularized-tricky-fail-2.rs:36:24
@@ -20,7 +20,7 @@ LL |         () => ( struct Г; )
    |                        ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/local-modularized-tricky-fail-2.rs:46:24
@@ -32,7 +32,7 @@ LL |         () => ( struct Д; )
    |                        ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/inference/inference_unstable_forced.stderr b/src/test/ui/inference/inference_unstable_forced.stderr
index 83e27aaf2f8..79a0b60b0a7 100644
--- a/src/test/ui/inference/inference_unstable_forced.stderr
+++ b/src/test/ui/inference/inference_unstable_forced.stderr
@@ -5,7 +5,7 @@ LL |     assert_eq!('x'.ipu_flatten(), 0);
    |                    ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/99999
-   = help: add #![feature(ipu_flatten)] to the crate attributes to enable
+   = help: add `#![feature(ipu_flatten)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/infinite/infinite-autoderef.stderr b/src/test/ui/infinite/infinite-autoderef.stderr
index a5cc66f4473..3159a4b67da 100644
--- a/src/test/ui/infinite/infinite-autoderef.stderr
+++ b/src/test/ui/infinite/infinite-autoderef.stderr
@@ -13,7 +13,7 @@ error[E0055]: reached the recursion limit while auto-dereferencing `Foo`
 LL |     Foo.foo;
    |     ^^^^^^^ deref recursion limit reached
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
 
 error[E0055]: reached the recursion limit while auto-dereferencing `Foo`
   --> $DIR/infinite-autoderef.rs:25:9
@@ -21,7 +21,7 @@ error[E0055]: reached the recursion limit while auto-dereferencing `Foo`
 LL |     Foo.foo;
    |         ^^^ deref recursion limit reached
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
 
 error[E0609]: no field `foo` on type `Foo`
   --> $DIR/infinite-autoderef.rs:25:9
@@ -35,7 +35,7 @@ error[E0055]: reached the recursion limit while auto-dereferencing `Foo`
 LL |     Foo.bar();
    |         ^^^ deref recursion limit reached
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
 
 error[E0599]: no method named `bar` found for type `Foo` in the current scope
   --> $DIR/infinite-autoderef.rs:26:9
diff --git a/src/test/ui/infinite/infinite-instantiation.stderr b/src/test/ui/infinite/infinite-instantiation.stderr
index 976b9e36cf8..d75dc0403a2 100644
--- a/src/test/ui/infinite/infinite-instantiation.stderr
+++ b/src/test/ui/infinite/infinite-instantiation.stderr
@@ -1,4 +1,4 @@
-error: reached the recursion limit while instantiating `function::<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<usize>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+error: reached the recursion limit while instantiating `function::<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<usize>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
   --> $DIR/infinite-instantiation.rs:23:1
    |
 LL | / fn function<T:ToOpt + Clone>(counter: usize, t: T) {
diff --git a/src/test/ui/infinite/infinite-macro-expansion.stderr b/src/test/ui/infinite/infinite-macro-expansion.stderr
index 0faf29f0b3e..0c0c6596760 100644
--- a/src/test/ui/infinite/infinite-macro-expansion.stderr
+++ b/src/test/ui/infinite/infinite-macro-expansion.stderr
@@ -7,7 +7,7 @@ LL |     () => (recursive!())
 LL |     recursive!()
    |     ------------ in this macro invocation
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/internal/internal-unstable-noallow.stderr b/src/test/ui/internal/internal-unstable-noallow.stderr
index 7247f68fa43..5a3a2356150 100644
--- a/src/test/ui/internal/internal-unstable-noallow.stderr
+++ b/src/test/ui/internal/internal-unstable-noallow.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'function'
 LL |     call_unstable_noallow!();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(function)] to the crate attributes to enable
+   = help: add `#![feature(function)]` to the crate attributes to enable
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error[E0658]: use of unstable library feature 'struct_field'
@@ -13,7 +13,7 @@ error[E0658]: use of unstable library feature 'struct_field'
 LL |     construct_unstable_noallow!(0);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(struct_field)] to the crate attributes to enable
+   = help: add `#![feature(struct_field)]` to the crate attributes to enable
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error[E0658]: use of unstable library feature 'method'
@@ -22,7 +22,7 @@ error[E0658]: use of unstable library feature 'method'
 LL |     |x: internal_unstable::Foo| { call_method_noallow!(x) };
    |                                   ^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(method)] to the crate attributes to enable
+   = help: add `#![feature(method)]` to the crate attributes to enable
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error[E0658]: use of unstable library feature 'struct2_field'
@@ -31,7 +31,7 @@ error[E0658]: use of unstable library feature 'struct2_field'
 LL |     |x: internal_unstable::Bar| { access_field_noallow!(x) };
    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(struct2_field)] to the crate attributes to enable
+   = help: add `#![feature(struct2_field)]` to the crate attributes to enable
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error: aborting due to 4 previous errors
diff --git a/src/test/ui/internal/internal-unstable-thread-local.stderr b/src/test/ui/internal/internal-unstable-thread-local.stderr
index 603bdc39bdd..558e3dbb78d 100644
--- a/src/test/ui/internal/internal-unstable-thread-local.stderr
+++ b/src/test/ui/internal/internal-unstable-thread-local.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'function'
 LL | thread_local!(static BAR: () = internal_unstable::unstable());
    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(function)] to the crate attributes to enable
+   = help: add `#![feature(function)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/internal/internal-unstable.stderr b/src/test/ui/internal/internal-unstable.stderr
index 5c14fed568f..2c9d1469210 100644
--- a/src/test/ui/internal/internal-unstable.stderr
+++ b/src/test/ui/internal/internal-unstable.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'function'
 LL |     pass_through_allow!(internal_unstable::unstable());
    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(function)] to the crate attributes to enable
+   = help: add `#![feature(function)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'function'
   --> $DIR/internal-unstable.rs:35:27
@@ -12,7 +12,7 @@ error[E0658]: use of unstable library feature 'function'
 LL |     pass_through_noallow!(internal_unstable::unstable());
    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(function)] to the crate attributes to enable
+   = help: add `#![feature(function)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'function'
   --> $DIR/internal-unstable.rs:39:22
@@ -20,7 +20,7 @@ error[E0658]: use of unstable library feature 'function'
 LL |     println!("{:?}", internal_unstable::unstable());
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(function)] to the crate attributes to enable
+   = help: add `#![feature(function)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'function'
   --> $DIR/internal-unstable.rs:41:10
@@ -28,7 +28,7 @@ error[E0658]: use of unstable library feature 'function'
 LL |     bar!(internal_unstable::unstable());
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(function)] to the crate attributes to enable
+   = help: add `#![feature(function)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'function'
   --> $DIR/internal-unstable.rs:12:9
@@ -39,7 +39,7 @@ LL |         internal_unstable::unstable();
 LL |     bar!(internal_unstable::unstable());
    |     ------------------------------------ in this macro invocation
    |
-   = help: add #![feature(function)] to the crate attributes to enable
+   = help: add `#![feature(function)]` to the crate attributes to enable
 
 error: aborting due to 5 previous errors
 
diff --git a/src/test/ui/intrinsics/unchecked_math_unstable.stderr b/src/test/ui/intrinsics/unchecked_math_unstable.stderr
index 6f5429127c6..a43aa16aedc 100644
--- a/src/test/ui/intrinsics/unchecked_math_unstable.stderr
+++ b/src/test/ui/intrinsics/unchecked_math_unstable.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'core_intrinsics': intrinsics are
 LL |         let add = std::intrinsics::unchecked_add(x, y);
    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(core_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(core_intrinsics)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'core_intrinsics': intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library
   --> $DIR/unchecked_math_unstable.rs:5:19
@@ -12,7 +12,7 @@ error[E0658]: use of unstable library feature 'core_intrinsics': intrinsics are
 LL |         let sub = std::intrinsics::unchecked_sub(x, y);
    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(core_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(core_intrinsics)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'core_intrinsics': intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library
   --> $DIR/unchecked_math_unstable.rs:6:19
@@ -20,7 +20,7 @@ error[E0658]: use of unstable library feature 'core_intrinsics': intrinsics are
 LL |         let mul = std::intrinsics::unchecked_mul(x, y);
    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(core_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(core_intrinsics)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/issues/issue-16098.stderr b/src/test/ui/issues/issue-16098.stderr
index cdab76ca70b..f890baf8eba 100644
--- a/src/test/ui/issues/issue-16098.stderr
+++ b/src/test/ui/issues/issue-16098.stderr
@@ -7,7 +7,7 @@ LL |             $n + prob1!($n - 1);
 LL |     println!("Problem 1: {}", prob1!(1000));
    |                               ------------ in this macro invocation
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-17458.stderr b/src/test/ui/issues/issue-17458.stderr
index d51d2f50d6f..bb667e7b7d4 100644
--- a/src/test/ui/issues/issue-17458.stderr
+++ b/src/test/ui/issues/issue-17458.stderr
@@ -5,7 +5,7 @@ LL | static X: usize = unsafe { core::ptr::null::<usize>() as usize };
    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51910
-   = help: add #![feature(const_raw_ptr_to_usize_cast)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_to_usize_cast)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-18294.stderr b/src/test/ui/issues/issue-18294.stderr
index d10242434b0..7d6ef5eee07 100644
--- a/src/test/ui/issues/issue-18294.stderr
+++ b/src/test/ui/issues/issue-18294.stderr
@@ -5,7 +5,7 @@ LL |     const Y: usize = unsafe { &X as *const u32 as usize };
    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51910
-   = help: add #![feature(const_raw_ptr_to_usize_cast)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_to_usize_cast)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-18400.stderr b/src/test/ui/issues/issue-18400.stderr
index 9c496cac88e..85cfa5663f1 100644
--- a/src/test/ui/issues/issue-18400.stderr
+++ b/src/test/ui/issues/issue-18400.stderr
@@ -4,7 +4,7 @@ error[E0275]: overflow evaluating the requirement `_: std::marker::Sized`
 LL |     0.contains(bits);
    |       ^^^^^^^^
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
    = note: required because of the requirements on the impl of `Set<&[_]>` for `{integer}`
    = note: required because of the requirements on the impl of `Set<&[&[_]]>` for `{integer}`
    = note: required because of the requirements on the impl of `Set<&[&[&[_]]]>` for `{integer}`
@@ -69,6 +69,70 @@ LL |     0.contains(bits);
    = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
    = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
    = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
+   = note: required because of the requirements on the impl of `Set<&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[&[_]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>` for `{integer}`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-20313.stderr b/src/test/ui/issues/issue-20313.stderr
index 405e717c358..a3fa7ebba8e 100644
--- a/src/test/ui/issues/issue-20313.stderr
+++ b/src/test/ui/issues/issue-20313.stderr
@@ -5,7 +5,7 @@ LL |     fn sqrt(x: f32) -> f32;
    |     ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29602
-   = help: add #![feature(link_llvm_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(link_llvm_intrinsics)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-20413.stderr b/src/test/ui/issues/issue-20413.stderr
index 6ef806cd668..762816c5a98 100644
--- a/src/test/ui/issues/issue-20413.stderr
+++ b/src/test/ui/issues/issue-20413.stderr
@@ -6,7 +6,7 @@ LL | struct NoData<T>;
    |
    = help: consider removing `T` or using a marker such as `std::marker::PhantomData`
 
-error[E0275]: overflow evaluating the requirement `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>: Foo`
+error[E0275]: overflow evaluating the requirement `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>: Foo`
   --> $DIR/issue-20413.rs:8:1
    |
 LL | / impl<T> Foo for T where NoData<T>: Foo {
@@ -18,7 +18,71 @@ LL | |   }
 LL | | }
    | |_^
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
    = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
    = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
    = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
@@ -88,7 +152,7 @@ note: required by `Foo`
 LL | trait Foo {
    | ^^^^^^^^^
 
-error[E0275]: overflow evaluating the requirement `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>: Foo`
+error[E0275]: overflow evaluating the requirement `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>: Foo`
   --> $DIR/issue-20413.rs:10:3
    |
 LL | /   fn answer(self) {
@@ -97,7 +161,71 @@ LL | |     let val: NoData<T> = NoData;
 LL | |   }
    | |___^
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+   = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
    = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
    = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
    = note: required because of the requirements on the impl of `Foo` for `NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<NoData<T>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
diff --git a/src/test/ui/issues/issue-23024.stderr b/src/test/ui/issues/issue-23024.stderr
index e99854539de..43561938ef1 100644
--- a/src/test/ui/issues/issue-23024.stderr
+++ b/src/test/ui/issues/issue-23024.stderr
@@ -5,7 +5,7 @@ LL |     println!("{:?}",(vfnfer[0] as dyn Fn)(3));
    |                                       ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0107]: wrong number of type arguments: expected 1, found 0
   --> $DIR/issue-23024.rs:9:39
diff --git a/src/test/ui/issues/issue-23122-2.stderr b/src/test/ui/issues/issue-23122-2.stderr
index b122dd42373..d2c1421e29e 100644
--- a/src/test/ui/issues/issue-23122-2.stderr
+++ b/src/test/ui/issues/issue-23122-2.stderr
@@ -1,20 +1,20 @@
-error[E0275]: overflow evaluating the requirement `<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<T as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next: std::marker::Sized`
+error[E0275]: overflow evaluating the requirement `<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<T as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next: std::marker::Sized`
   --> $DIR/issue-23122-2.rs:7:15
    |
 LL | impl<T: Next> Next for GetNext<T> {
    |               ^^^^
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
-   = note: required because of the requirements on the impl of `Next` for `GetNext<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<T as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next>`
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
+   = note: required because of the requirements on the impl of `Next` for `GetNext<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<T as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next>`
 
-error[E0275]: overflow evaluating the requirement `<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<T as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next: std::marker::Sized`
+error[E0275]: overflow evaluating the requirement `<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<T as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next: std::marker::Sized`
   --> $DIR/issue-23122-2.rs:9:5
    |
 LL |     type Next = <GetNext<T::Next> as Next>::Next;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: consider adding a `#![recursion_limit="128"]` attribute to your crate
-   = note: required because of the requirements on the impl of `Next` for `GetNext<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<T as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next>`
+   = help: consider adding a `#![recursion_limit="256"]` attribute to your crate
+   = note: required because of the requirements on the impl of `Next` for `GetNext<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<T as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next as Next>::Next>`
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/issues/issue-25826.stderr b/src/test/ui/issues/issue-25826.stderr
index a800f787e38..84d5aeef63a 100644
--- a/src/test/ui/issues/issue-25826.stderr
+++ b/src/test/ui/issues/issue-25826.stderr
@@ -5,7 +5,7 @@ LL |     const A: bool = unsafe { id::<u8> as *const () < id::<u16> as *const ()
    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53020
-   = help: add #![feature(const_compare_raw_pointers)] to the crate attributes to enable
+   = help: add `#![feature(const_compare_raw_pointers)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-28075.stderr b/src/test/ui/issues/issue-28075.stderr
index 323be5cc2cf..7e53bb54457 100644
--- a/src/test/ui/issues/issue-28075.stderr
+++ b/src/test/ui/issues/issue-28075.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL | use lint_stability::{unstable, deprecated};
    |                      ^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-28388-3.stderr b/src/test/ui/issues/issue-28388-3.stderr
index 2eb8249250e..d2e46683b90 100644
--- a/src/test/ui/issues/issue-28388-3.stderr
+++ b/src/test/ui/issues/issue-28388-3.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL | use lint_stability::UnstableEnum::{};
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-32655.stderr b/src/test/ui/issues/issue-32655.stderr
index 3ab934f6ca5..43bb4105c8d 100644
--- a/src/test/ui/issues/issue-32655.stderr
+++ b/src/test/ui/issues/issue-32655.stderr
@@ -8,7 +8,7 @@ LL | foo!();
    | ------- in this macro invocation
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `derive_Clone` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/issue-32655.rs:18:7
@@ -17,7 +17,7 @@ LL |     #[derive_Clone]
    |       ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/issues/issue-32782.stderr b/src/test/ui/issues/issue-32782.stderr
index 886f5297156..029826f09a2 100644
--- a/src/test/ui/issues/issue-32782.stderr
+++ b/src/test/ui/issues/issue-32782.stderr
@@ -7,7 +7,7 @@ LL |         #[allow_internal_unstable]
 LL | foo!();
    | ------- in this macro invocation
    |
-   = help: add #![feature(allow_internal_unstable)] to the crate attributes to enable
+   = help: add `#![feature(allow_internal_unstable)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-32829.stderr b/src/test/ui/issues/issue-32829.stderr
index 157c8c85af0..b620abbf436 100644
--- a/src/test/ui/issues/issue-32829.stderr
+++ b/src/test/ui/issues/issue-32829.stderr
@@ -5,7 +5,7 @@ LL | static S : u64 = { { panic!("foo"); 0 } };
    |                      ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51999
-   = help: add #![feature(const_panic)] to the crate attributes to enable
+   = help: add `#![feature(const_panic)]` to the crate attributes to enable
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error: aborting due to previous error
diff --git a/src/test/ui/issues/issue-37887.stderr b/src/test/ui/issues/issue-37887.stderr
index 81ec3a5956b..b1b9754523f 100644
--- a/src/test/ui/issues/issue-37887.stderr
+++ b/src/test/ui/issues/issue-37887.stderr
@@ -11,7 +11,7 @@ LL |     extern crate libc;
    |     ^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
-   = help: add #![feature(rustc_private)] to the crate attributes to enable
+   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/issues/issue-49074.stderr b/src/test/ui/issues/issue-49074.stderr
index 29e10f1bf41..3ab876dbf42 100644
--- a/src/test/ui/issues/issue-49074.stderr
+++ b/src/test/ui/issues/issue-49074.stderr
@@ -5,7 +5,7 @@ LL | #[marco_use] // typo
    |   ^^^^^^^^^ help: a built-in attribute with a similar name exists: `macro_use`
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: cannot find macro `bar!` in this scope
   --> $DIR/issue-49074.rs:12:4
diff --git a/src/test/ui/issues/issue-52023-array-size-pointer-cast.stderr b/src/test/ui/issues/issue-52023-array-size-pointer-cast.stderr
index f8c3016e3a7..2db6f42405c 100644
--- a/src/test/ui/issues/issue-52023-array-size-pointer-cast.stderr
+++ b/src/test/ui/issues/issue-52023-array-size-pointer-cast.stderr
@@ -5,7 +5,7 @@ LL |     let _ = [0; (&0 as *const i32) as usize];
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/51910
-   = help: add #![feature(const_raw_ptr_to_usize_cast)] to the crate attributes to enable
+   = help: add `#![feature(const_raw_ptr_to_usize_cast)]` to the crate attributes to enable
 
 error[E0080]: it is undefined behavior to use this value
   --> $DIR/issue-52023-array-size-pointer-cast.rs:2:17
diff --git a/src/test/ui/issues/issue-52489.stderr b/src/test/ui/issues/issue-52489.stderr
index 339877f87ea..842ebd19698 100644
--- a/src/test/ui/issues/issue-52489.stderr
+++ b/src/test/ui/issues/issue-52489.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'issue_52489_unstable'
 LL | use issue_52489;
    |     ^^^^^^^^^^^
    |
-   = help: add #![feature(issue_52489_unstable)] to the crate attributes to enable
+   = help: add `#![feature(issue_52489_unstable)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/issues/issue-8727.stderr b/src/test/ui/issues/issue-8727.stderr
index dd23830ea35..a7d020cb675 100644
--- a/src/test/ui/issues/issue-8727.stderr
+++ b/src/test/ui/issues/issue-8727.stderr
@@ -9,7 +9,7 @@ LL |     generic::<Option<T>>();
    = note: #[warn(unconditional_recursion)] on by default
    = help: a `loop` may express intention better if this is on purpose
 
-error: reached the recursion limit while instantiating `generic::<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+error: reached the recursion limit while instantiating `generic::<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<std::option::Option<i32>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
   --> $DIR/issue-8727.rs:4:1
    |
 LL | / fn generic<T>() {
diff --git a/src/test/ui/linkage-attr/linkage4.stderr b/src/test/ui/linkage-attr/linkage4.stderr
index f2aab164bd7..b46941067ad 100644
--- a/src/test/ui/linkage-attr/linkage4.stderr
+++ b/src/test/ui/linkage-attr/linkage4.stderr
@@ -5,7 +5,7 @@ LL | #[linkage = "external"]
    | ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29603
-   = help: add #![feature(linkage)] to the crate attributes to enable
+   = help: add `#![feature(linkage)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/lint/lint-output-format.stderr b/src/test/ui/lint/lint-output-format.stderr
index 21b12301e2c..3bc1d6fc135 100644
--- a/src/test/ui/lint/lint-output-format.stderr
+++ b/src/test/ui/lint/lint-output-format.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL | extern crate lint_output_format;
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-output-format.rs:7:31
@@ -12,7 +12,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL | use lint_output_format::{foo, bar};
    |                               ^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-output-format.rs:11:14
@@ -20,7 +20,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |     let _y = bar();
    |              ^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/lint/lint-stability-2.stderr b/src/test/ui/lint/lint-stability-2.stderr
index 808c16c95a4..5b7537fa234 100644
--- a/src/test/ui/lint/lint-stability-2.stderr
+++ b/src/test/ui/lint/lint-stability-2.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.method_deprecated_unstable();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:42:9
@@ -12,7 +12,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         Foo::method_deprecated_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:44:9
@@ -20,7 +20,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo>::method_deprecated_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:46:13
@@ -28,7 +28,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.trait_deprecated_unstable();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:48:9
@@ -36,7 +36,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo>::trait_deprecated_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:51:13
@@ -44,7 +44,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.method_deprecated_unstable_text();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:53:9
@@ -52,7 +52,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         Foo::method_deprecated_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:55:9
@@ -60,7 +60,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo>::method_deprecated_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:57:13
@@ -68,7 +68,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.trait_deprecated_unstable_text();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:59:9
@@ -76,7 +76,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo>::trait_deprecated_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:62:13
@@ -84,7 +84,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.method_unstable();
    |             ^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:63:9
@@ -92,7 +92,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         Foo::method_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:64:9
@@ -100,7 +100,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo>::method_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:65:13
@@ -108,7 +108,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.trait_unstable();
    |             ^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:66:9
@@ -116,7 +116,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo>::trait_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability-2.rs:68:13
@@ -124,7 +124,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         foo.method_unstable_text();
    |             ^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability-2.rs:70:9
@@ -132,7 +132,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         Foo::method_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability-2.rs:72:9
@@ -140,7 +140,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         <Foo>::method_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability-2.rs:74:13
@@ -148,7 +148,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         foo.trait_unstable_text();
    |             ^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability-2.rs:76:9
@@ -156,7 +156,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         <Foo>::trait_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:131:13
@@ -164,7 +164,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.trait_deprecated_unstable();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:133:9
@@ -172,7 +172,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo>::trait_deprecated_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:135:13
@@ -180,7 +180,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.trait_deprecated_unstable_text();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:137:9
@@ -188,7 +188,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo>::trait_deprecated_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:139:13
@@ -196,7 +196,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.trait_unstable();
    |             ^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:140:9
@@ -204,7 +204,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo>::trait_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability-2.rs:141:13
@@ -212,7 +212,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         foo.trait_unstable_text();
    |             ^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability-2.rs:143:9
@@ -220,7 +220,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         <Foo>::trait_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:154:13
@@ -228,7 +228,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.trait_deprecated_unstable();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:156:13
@@ -236,7 +236,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.trait_deprecated_unstable_text();
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-2.rs:158:13
@@ -244,7 +244,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         foo.trait_unstable();
    |             ^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability-2.rs:159:13
@@ -252,7 +252,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         foo.trait_unstable_text();
    |             ^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error: aborting due to 32 previous errors
 
diff --git a/src/test/ui/lint/lint-stability-fields.stderr b/src/test/ui/lint/lint-stability-fields.stderr
index e80e745922d..b6a08186b5f 100644
--- a/src/test/ui/lint/lint-stability-fields.stderr
+++ b/src/test/ui/lint/lint-stability-fields.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let x = Unstable {
    |                 ^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:61:13
@@ -12,7 +12,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let Unstable {
    |             ^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:67:13
@@ -20,7 +20,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let Unstable
    |             ^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:72:17
@@ -28,7 +28,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let x = reexport::Unstable2(1, 2, 3);
    |                 ^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:74:17
@@ -36,7 +36,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let x = Unstable2(1, 2, 3);
    |                 ^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:80:13
@@ -44,7 +44,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let Unstable2
    |             ^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:85:13
@@ -52,7 +52,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let Unstable2
    |             ^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:90:17
@@ -60,7 +60,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let x = Deprecated {
    |                 ^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:100:13
@@ -68,7 +68,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let Deprecated {
    |             ^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:106:13
@@ -76,7 +76,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let Deprecated
    |             ^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:110:17
@@ -84,7 +84,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let x = Deprecated2(1, 2, 3);
    |                 ^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:116:13
@@ -92,7 +92,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let Deprecated2
    |             ^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:121:13
@@ -100,7 +100,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let Deprecated2
    |             ^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:21:13
@@ -108,7 +108,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             override1: 2,
    |             ^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:22:13
@@ -116,7 +116,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             override2: 3,
    |             ^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:26:17
@@ -124,7 +124,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.override1;
    |                 ^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:27:17
@@ -132,7 +132,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.override2;
    |                 ^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:31:13
@@ -140,7 +140,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             override1: _,
    |             ^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:32:13
@@ -148,7 +148,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             override2: _
    |             ^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:40:17
@@ -156,7 +156,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.1;
    |                 ^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:41:17
@@ -164,7 +164,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.2;
    |                 ^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:44:20
@@ -172,7 +172,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |                    _,
    |                    ^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:45:20
@@ -180,7 +180,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |                    _)
    |                    ^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:52:13
@@ -188,7 +188,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             inherit: 1,
    |             ^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:54:13
@@ -196,7 +196,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             override2: 3,
    |             ^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:57:17
@@ -204,7 +204,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.inherit;
    |                 ^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:59:17
@@ -212,7 +212,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.override2;
    |                 ^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:62:13
@@ -220,7 +220,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             inherit: _,
    |             ^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:64:13
@@ -228,7 +228,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             override2: _
    |             ^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:76:17
@@ -236,7 +236,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.0;
    |                 ^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:78:17
@@ -244,7 +244,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.2;
    |                 ^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:81:14
@@ -252,7 +252,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             (_,
    |              ^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:83:14
@@ -260,7 +260,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |              _)
    |              ^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:91:13
@@ -268,7 +268,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             inherit: 1,
    |             ^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:93:13
@@ -276,7 +276,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             override2: 3,
    |             ^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:96:17
@@ -284,7 +284,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.inherit;
    |                 ^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:98:17
@@ -292,7 +292,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.override2;
    |                 ^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:101:13
@@ -300,7 +300,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             inherit: _,
    |             ^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:103:13
@@ -308,7 +308,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             override2: _
    |             ^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:112:17
@@ -316,7 +316,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.0;
    |                 ^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:114:17
@@ -324,7 +324,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = x.2;
    |                 ^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:117:14
@@ -332,7 +332,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             (_,
    |              ^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability-fields.rs:119:14
@@ -340,7 +340,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |              _)
    |              ^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error: aborting due to 43 previous errors
 
diff --git a/src/test/ui/lint/lint-stability.stderr b/src/test/ui/lint/lint-stability.stderr
index dd7f7182530..167140ef92b 100644
--- a/src/test/ui/lint/lint-stability.stderr
+++ b/src/test/ui/lint/lint-stability.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |     extern crate stability_cfg2;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:45:9
@@ -12,7 +12,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         deprecated_unstable();
    |         ^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:47:9
@@ -20,7 +20,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         Trait::trait_deprecated_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:49:9
@@ -28,7 +28,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo as Trait>::trait_deprecated_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:52:9
@@ -36,7 +36,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         deprecated_unstable_text();
    |         ^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:54:9
@@ -44,7 +44,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         Trait::trait_deprecated_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:56:9
@@ -52,7 +52,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo as Trait>::trait_deprecated_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:59:9
@@ -60,7 +60,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         unstable();
    |         ^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:60:9
@@ -68,7 +68,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         Trait::trait_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:61:9
@@ -76,7 +76,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo as Trait>::trait_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability.rs:63:9
@@ -84,7 +84,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         unstable_text();
    |         ^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability.rs:65:9
@@ -92,7 +92,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         Trait::trait_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability.rs:67:9
@@ -100,7 +100,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         <Foo as Trait>::trait_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:99:17
@@ -108,7 +108,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = DeprecatedUnstableStruct {
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:103:17
@@ -116,7 +116,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = UnstableStruct { i: 0 };
    |                 ^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:107:17
@@ -124,7 +124,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = DeprecatedUnstableUnitStruct;
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:109:17
@@ -132,7 +132,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = UnstableUnitStruct;
    |                 ^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:113:17
@@ -140,7 +140,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = Enum::DeprecatedUnstableVariant;
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:115:17
@@ -148,7 +148,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = Enum::UnstableVariant;
    |                 ^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:119:17
@@ -156,7 +156,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = DeprecatedUnstableTupleStruct (1);
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:121:17
@@ -164,7 +164,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = UnstableTupleStruct (1);
    |                 ^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:130:25
@@ -172,7 +172,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         macro_test_arg!(deprecated_unstable_text());
    |                         ^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:144:9
@@ -180,7 +180,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         Trait::trait_deprecated_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:146:9
@@ -188,7 +188,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo as Trait>::trait_deprecated_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:148:9
@@ -196,7 +196,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         Trait::trait_deprecated_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:150:9
@@ -204,7 +204,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo as Trait>::trait_deprecated_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:152:9
@@ -212,7 +212,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         Trait::trait_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:153:9
@@ -220,7 +220,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         <Foo as Trait>::trait_unstable(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability.rs:154:9
@@ -228,7 +228,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         Trait::trait_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': text
   --> $DIR/lint-stability.rs:156:9
@@ -236,7 +236,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature': text
 LL |         <Foo as Trait>::trait_unstable_text(&foo);
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:172:10
@@ -244,7 +244,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |     impl UnstableTrait for S { }
    |          ^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:174:24
@@ -252,7 +252,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |     trait LocalTrait : UnstableTrait { }
    |                        ^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:179:9
@@ -260,7 +260,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         fn trait_unstable(&self) {}
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:184:5
@@ -268,7 +268,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |     extern crate inherited_stability;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:185:9
@@ -276,7 +276,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |     use self::inherited_stability::*;
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:188:9
@@ -284,7 +284,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         unstable();
    |         ^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:191:9
@@ -292,7 +292,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         stable_mod::unstable();
    |         ^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:195:9
@@ -300,7 +300,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         unstable_mod::unstable();
    |         ^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:197:17
@@ -308,7 +308,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         let _ = Unstable::UnstableVariant;
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:88:48
@@ -316,7 +316,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |         struct S1<T: TraitWithAssociatedTypes>(T::TypeUnstable);
    |                                                ^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature'
   --> $DIR/lint-stability.rs:92:13
@@ -324,7 +324,7 @@ error[E0658]: use of unstable library feature 'unstable_test_feature'
 LL |             TypeUnstable = u8,
    |             ^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error: aborting due to 41 previous errors
 
diff --git a/src/test/ui/macros/macro-reexport-removed.stderr b/src/test/ui/macros/macro-reexport-removed.stderr
index 742a72964db..44233d7b7dd 100644
--- a/src/test/ui/macros/macro-reexport-removed.stderr
+++ b/src/test/ui/macros/macro-reexport-removed.stderr
@@ -17,7 +17,7 @@ LL | #[macro_reexport(macro_one)]
    |   ^^^^^^^^^^^^^^ help: a built-in attribute with a similar name exists: `macro_export`
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/macros/macro-stability.stderr b/src/test/ui/macros/macro-stability.stderr
index 88edadc3811..6f84c450a2e 100644
--- a/src/test/ui/macros/macro-stability.stderr
+++ b/src/test/ui/macros/macro-stability.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'local_unstable'
 LL |     local_unstable!();
    |     ^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(local_unstable)] to the crate attributes to enable
+   = help: add `#![feature(local_unstable)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'local_unstable'
   --> $DIR/macro-stability.rs:20:5
@@ -12,7 +12,7 @@ error[E0658]: use of unstable library feature 'local_unstable'
 LL |     local_unstable_modern!();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(local_unstable)] to the crate attributes to enable
+   = help: add `#![feature(local_unstable)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_macros'
   --> $DIR/macro-stability.rs:21:5
@@ -20,7 +20,7 @@ error[E0658]: use of unstable library feature 'unstable_macros'
 LL |     unstable_macro!();
    |     ^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(unstable_macros)] to the crate attributes to enable
+   = help: add `#![feature(unstable_macros)]` to the crate attributes to enable
 
 warning: use of deprecated item 'deprecated_macro': deprecation reason
   --> $DIR/macro-stability.rs:24:5
diff --git a/src/test/ui/macros/macros-in-extern.stderr b/src/test/ui/macros/macros-in-extern.stderr
index ec7c37402d4..6ee33f4ab61 100644
--- a/src/test/ui/macros/macros-in-extern.stderr
+++ b/src/test/ui/macros/macros-in-extern.stderr
@@ -5,7 +5,7 @@ LL |     returns_isize!(rust_get_test_int);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49476
-   = help: add #![feature(macros_in_extern)] to the crate attributes to enable
+   = help: add `#![feature(macros_in_extern)]` to the crate attributes to enable
 
 error[E0658]: macro invocations in `extern {}` blocks are experimental
   --> $DIR/macros-in-extern.rs:28:5
@@ -14,7 +14,7 @@ LL |     takes_u32_returns_u32!(rust_dbg_extern_identity_u32);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49476
-   = help: add #![feature(macros_in_extern)] to the crate attributes to enable
+   = help: add `#![feature(macros_in_extern)]` to the crate attributes to enable
 
 error[E0658]: macro invocations in `extern {}` blocks are experimental
   --> $DIR/macros-in-extern.rs:30:5
@@ -23,7 +23,7 @@ LL |     emits_nothing!();
    |     ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49476
-   = help: add #![feature(macros_in_extern)] to the crate attributes to enable
+   = help: add `#![feature(macros_in_extern)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/nll/issue-42574-diagnostic-in-nested-closure.rs b/src/test/ui/nll/issue-42574-diagnostic-in-nested-closure.rs
new file mode 100644
index 00000000000..f45370e5c2e
--- /dev/null
+++ b/src/test/ui/nll/issue-42574-diagnostic-in-nested-closure.rs
@@ -0,0 +1,13 @@
+// This test illustrates a case where full NLL (enabled by the feature
+// switch below) produces superior diagnostics to the NLL-migrate
+// mode.
+
+#![feature(nll)]
+
+fn doit(data: &'static mut ()) {
+    || doit(data);
+    //~^ ERROR lifetime may not live long enough
+    //~| ERROR `data` does not live long enough
+}
+
+fn main() { }
diff --git a/src/test/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr b/src/test/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr
new file mode 100644
index 00000000000..4c70a8475f2
--- /dev/null
+++ b/src/test/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr
@@ -0,0 +1,26 @@
+error: lifetime may not live long enough
+  --> $DIR/issue-42574-diagnostic-in-nested-closure.rs:8:8
+   |
+LL |     || doit(data);
+   |     -- ^^^^^^^^^^ argument requires that `'1` must outlive `'static`
+   |     |
+   |     lifetime `'1` represents this closure's body
+   |
+   = note: closure implements `FnMut`, so references to captured variables can't escape the closure
+
+error[E0597]: `data` does not live long enough
+  --> $DIR/issue-42574-diagnostic-in-nested-closure.rs:8:13
+   |
+LL |     || doit(data);
+   |     -- -----^^^^-
+   |     |  |    |
+   |     |  |    borrowed value does not live long enough
+   |     |  argument requires that `data` is borrowed for `'static`
+   |     value captured here
+...
+LL | }
+   |  - `data` dropped here while still borrowed
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0597`.
diff --git a/src/test/ui/panic-runtime/needs-gate.stderr b/src/test/ui/panic-runtime/needs-gate.stderr
index 72999a0de89..ab5d9f8cda4 100644
--- a/src/test/ui/panic-runtime/needs-gate.stderr
+++ b/src/test/ui/panic-runtime/needs-gate.stderr
@@ -5,7 +5,7 @@ LL | #![panic_runtime]
    | ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32837
-   = help: add #![feature(panic_runtime)] to the crate attributes to enable
+   = help: add `#![feature(panic_runtime)]` to the crate attributes to enable
 
 error[E0658]: the `#[needs_panic_runtime]` attribute is an experimental feature
   --> $DIR/needs-gate.rs:5:1
@@ -14,7 +14,7 @@ LL | #![needs_panic_runtime]
    | ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/32837
-   = help: add #![feature(needs_panic_runtime)] to the crate attributes to enable
+   = help: add `#![feature(needs_panic_runtime)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/parser/fn-arg-doc-comment.stderr b/src/test/ui/parser/fn-arg-doc-comment.stderr
index 9058e88d1d7..d8884de1fe8 100644
--- a/src/test/ui/parser/fn-arg-doc-comment.stderr
+++ b/src/test/ui/parser/fn-arg-doc-comment.stderr
@@ -23,7 +23,7 @@ LL |     /// Comment
    |     ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60406
-   = help: add #![feature(param_attrs)] to the crate attributes to enable
+   = help: add `#![feature(param_attrs)]` to the crate attributes to enable
 
 error[E0658]: attributes on function parameters are unstable
   --> $DIR/fn-arg-doc-comment.rs:8:5
@@ -32,7 +32,7 @@ LL |     /// Other
    |     ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60406
-   = help: add #![feature(param_attrs)] to the crate attributes to enable
+   = help: add `#![feature(param_attrs)]` to the crate attributes to enable
 
 error[E0308]: mismatched types
   --> $DIR/fn-arg-doc-comment.rs:22:7
diff --git a/src/test/ui/parser/issue-17383.stderr b/src/test/ui/parser/issue-17383.stderr
index 486c4055807..6a25c743e77 100644
--- a/src/test/ui/parser/issue-17383.stderr
+++ b/src/test/ui/parser/issue-17383.stderr
@@ -8,7 +8,7 @@ LL |     B(usize)
    |     -------- tuple variant defined here
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60553
-   = help: add #![feature(arbitrary_enum_discriminant)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_enum_discriminant)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/parser/tag-variant-disr-non-nullary.stderr b/src/test/ui/parser/tag-variant-disr-non-nullary.stderr
index 13b46c6e8b3..70acc70e092 100644
--- a/src/test/ui/parser/tag-variant-disr-non-nullary.stderr
+++ b/src/test/ui/parser/tag-variant-disr-non-nullary.stderr
@@ -18,7 +18,7 @@ LL |     Other2(usize, usize),
    |     -------------------- tuple variant defined here
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60553
-   = help: add #![feature(arbitrary_enum_discriminant)] to the crate attributes to enable
+   = help: add `#![feature(arbitrary_enum_discriminant)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/proc-macro/attr-stmt-expr.rs b/src/test/ui/proc-macro/attr-stmt-expr.rs
index 5fdaf93de44..14a392db4e1 100644
--- a/src/test/ui/proc-macro/attr-stmt-expr.rs
+++ b/src/test/ui/proc-macro/attr-stmt-expr.rs
@@ -9,7 +9,7 @@ fn print_str(string: &'static str) {
     // macros are handled a bit differently
     #[expect_print_expr]
     //~^ ERROR attributes on expressions are experimental
-    //~| HELP add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+    //~| HELP add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
     println!("{}", string)
 }
 
@@ -22,6 +22,6 @@ fn main() {
 
     #[expect_expr]
     //~^ ERROR attributes on expressions are experimental
-    //~| HELP add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+    //~| HELP add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
     print_str("string")
 }
diff --git a/src/test/ui/proc-macro/attr-stmt-expr.stderr b/src/test/ui/proc-macro/attr-stmt-expr.stderr
index 3928a973eab..d931a25dd41 100644
--- a/src/test/ui/proc-macro/attr-stmt-expr.stderr
+++ b/src/test/ui/proc-macro/attr-stmt-expr.stderr
@@ -5,7 +5,7 @@ LL |     #[expect_print_expr]
    |     ^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error[E0658]: attributes on expressions are experimental
   --> $DIR/attr-stmt-expr.rs:23:5
@@ -14,7 +14,7 @@ LL |     #[expect_expr]
    |     ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/proc-macro/derive-helper-shadowing.stderr b/src/test/ui/proc-macro/derive-helper-shadowing.stderr
index ed6d3051656..984ea4fb8ad 100644
--- a/src/test/ui/proc-macro/derive-helper-shadowing.stderr
+++ b/src/test/ui/proc-macro/derive-helper-shadowing.stderr
@@ -5,7 +5,7 @@ LL |             #[empty_helper]
    |               ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0659]: `empty_helper` is ambiguous (derive helper attribute vs any other name)
   --> $DIR/derive-helper-shadowing.rs:8:3
diff --git a/src/test/ui/proc-macro/derive-still-gated.stderr b/src/test/ui/proc-macro/derive-still-gated.stderr
index f299b5abdbc..a6c0ce6260a 100644
--- a/src/test/ui/proc-macro/derive-still-gated.stderr
+++ b/src/test/ui/proc-macro/derive-still-gated.stderr
@@ -5,7 +5,7 @@ LL | #[derive_Empty]
    |   ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/proc-macro/expand-to-unstable-2.stderr b/src/test/ui/proc-macro/expand-to-unstable-2.stderr
index 803773db88e..3a729846d78 100644
--- a/src/test/ui/proc-macro/expand-to-unstable-2.stderr
+++ b/src/test/ui/proc-macro/expand-to-unstable-2.stderr
@@ -5,7 +5,7 @@ LL | #[derive(Unstable)]
    |          ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error[E0658]: The attribute `rustc_foo` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/expand-to-unstable-2.rs:6:10
@@ -14,7 +14,7 @@ LL | #[derive(Unstable)]
    |          ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/proc-macro/expand-to-unstable.stderr b/src/test/ui/proc-macro/expand-to-unstable.stderr
index 29a1287955a..6df00765866 100644
--- a/src/test/ui/proc-macro/expand-to-unstable.stderr
+++ b/src/test/ui/proc-macro/expand-to-unstable.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature 'core_intrinsics': intrinsics are
 LL | #[derive(Unstable)]
    |          ^^^^^^^^
    |
-   = help: add #![feature(core_intrinsics)] to the crate attributes to enable
+   = help: add `#![feature(core_intrinsics)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/proc-macro/issue-41211.stderr b/src/test/ui/proc-macro/issue-41211.stderr
index 1de6b293ecf..b5c08587e19 100644
--- a/src/test/ui/proc-macro/issue-41211.stderr
+++ b/src/test/ui/proc-macro/issue-41211.stderr
@@ -5,7 +5,7 @@ LL | #![identity_attr]
    |    ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: inconsistent resolution for a macro: first custom attribute, then attribute macro
   --> $DIR/issue-41211.rs:8:4
diff --git a/src/test/ui/proc-macro/macros-in-extern.stderr b/src/test/ui/proc-macro/macros-in-extern.stderr
index 592c91553aa..6049c2aa448 100644
--- a/src/test/ui/proc-macro/macros-in-extern.stderr
+++ b/src/test/ui/proc-macro/macros-in-extern.stderr
@@ -5,7 +5,7 @@ LL |     #[empty_attr]
    |     ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49476
-   = help: add #![feature(macros_in_extern)] to the crate attributes to enable
+   = help: add `#![feature(macros_in_extern)]` to the crate attributes to enable
 
 error[E0658]: macro invocations in `extern {}` blocks are experimental
   --> $DIR/macros-in-extern.rs:18:5
@@ -14,7 +14,7 @@ LL |     #[identity_attr]
    |     ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49476
-   = help: add #![feature(macros_in_extern)] to the crate attributes to enable
+   = help: add `#![feature(macros_in_extern)]` to the crate attributes to enable
 
 error[E0658]: macro invocations in `extern {}` blocks are experimental
   --> $DIR/macros-in-extern.rs:22:5
@@ -23,7 +23,7 @@ LL |     identity!(fn rust_dbg_extern_identity_u32(arg: u32) -> u32;);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/49476
-   = help: add #![feature(macros_in_extern)] to the crate attributes to enable
+   = help: add `#![feature(macros_in_extern)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/proc-macro/more-gates.stderr b/src/test/ui/proc-macro/more-gates.stderr
index 80985ce7523..ad96f78c77a 100644
--- a/src/test/ui/proc-macro/more-gates.stderr
+++ b/src/test/ui/proc-macro/more-gates.stderr
@@ -5,7 +5,7 @@ LL | #[attr2mac1]
    | ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot expand to macro definitions
   --> $DIR/more-gates.rs:12:1
@@ -14,7 +14,7 @@ LL | #[attr2mac2]
    | ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot expand to macro definitions
   --> $DIR/more-gates.rs:16:1
@@ -23,7 +23,7 @@ LL | mac2mac1!();
    | ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot expand to macro definitions
   --> $DIR/more-gates.rs:17:1
@@ -32,7 +32,7 @@ LL | mac2mac2!();
    | ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot expand to macro definitions
   --> $DIR/more-gates.rs:19:1
@@ -41,7 +41,7 @@ LL | tricky!();
    | ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error: aborting due to 5 previous errors
 
diff --git a/src/test/ui/proc-macro/proc-macro-attributes.stderr b/src/test/ui/proc-macro/proc-macro-attributes.stderr
index 5117c7e1559..02dfce1a735 100644
--- a/src/test/ui/proc-macro/proc-macro-attributes.stderr
+++ b/src/test/ui/proc-macro/proc-macro-attributes.stderr
@@ -5,7 +5,7 @@ LL | #[C]
    |   ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0659]: `B` is ambiguous (derive helper attribute vs any other name)
   --> $DIR/proc-macro-attributes.rs:6:3
diff --git a/src/test/ui/proc-macro/proc-macro-gates.stderr b/src/test/ui/proc-macro/proc-macro-gates.stderr
index f53ad222a03..8197bbd71fb 100644
--- a/src/test/ui/proc-macro/proc-macro-gates.stderr
+++ b/src/test/ui/proc-macro/proc-macro-gates.stderr
@@ -5,7 +5,7 @@ LL |     #![empty_attr]
    |     ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54726
-   = help: add #![feature(custom_inner_attributes)] to the crate attributes to enable
+   = help: add `#![feature(custom_inner_attributes)]` to the crate attributes to enable
 
 error[E0658]: non-builtin inner attributes are unstable
   --> $DIR/proc-macro-gates.rs:17:5
@@ -14,7 +14,7 @@ LL |     #![empty_attr]
    |     ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54726
-   = help: add #![feature(custom_inner_attributes)] to the crate attributes to enable
+   = help: add `#![feature(custom_inner_attributes)]` to the crate attributes to enable
 
 error[E0658]: custom attributes cannot be applied to modules
   --> $DIR/proc-macro-gates.rs:13:1
@@ -23,7 +23,7 @@ LL | #[empty_attr]
    | ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: custom attributes cannot be applied to modules
   --> $DIR/proc-macro-gates.rs:17:5
@@ -32,7 +32,7 @@ LL |     #![empty_attr]
    |     ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error: custom attribute invocations must be of the form #[foo] or #[foo(..)], the macro name must only be followed by a delimiter token
   --> $DIR/proc-macro-gates.rs:21:1
@@ -47,7 +47,7 @@ LL |     #[empty_attr]
    |     ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: custom attributes cannot be applied to statements
   --> $DIR/proc-macro-gates.rs:34:5
@@ -56,7 +56,7 @@ LL |     #[empty_attr]
    |     ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: custom attributes cannot be applied to statements
   --> $DIR/proc-macro-gates.rs:38:5
@@ -65,7 +65,7 @@ LL |     #[empty_attr]
    |     ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: custom attributes cannot be applied to expressions
   --> $DIR/proc-macro-gates.rs:42:14
@@ -74,7 +74,7 @@ LL |     let _x = #[identity_attr] 2;
    |              ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: custom attributes cannot be applied to expressions
   --> $DIR/proc-macro-gates.rs:45:15
@@ -83,7 +83,7 @@ LL |     let _x = [#[identity_attr] 2];
    |               ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: custom attributes cannot be applied to expressions
   --> $DIR/proc-macro-gates.rs:48:14
@@ -92,7 +92,7 @@ LL |     let _x = #[identity_attr] println!();
    |              ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot be expanded to types
   --> $DIR/proc-macro-gates.rs:53:13
@@ -101,7 +101,7 @@ LL |     let _x: identity!(u32) = 3;
    |             ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot be expanded to patterns
   --> $DIR/proc-macro-gates.rs:54:12
@@ -110,7 +110,7 @@ LL |     if let identity!(Some(_x)) = Some(3) {}
    |            ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot be expanded to statements
   --> $DIR/proc-macro-gates.rs:57:5
@@ -119,7 +119,7 @@ LL |     empty!(struct S;);
    |     ^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot be expanded to statements
   --> $DIR/proc-macro-gates.rs:58:5
@@ -128,7 +128,7 @@ LL |     empty!(let _x = 3;);
    |     ^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot be expanded to expressions
   --> $DIR/proc-macro-gates.rs:60:14
@@ -137,7 +137,7 @@ LL |     let _x = identity!(3);
    |              ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error[E0658]: procedural macros cannot be expanded to expressions
   --> $DIR/proc-macro-gates.rs:61:15
@@ -146,7 +146,7 @@ LL |     let _x = [empty!(3)];
    |               ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54727
-   = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
+   = help: add `#![feature(proc_macro_hygiene)]` to the crate attributes to enable
 
 error: aborting due to 17 previous errors
 
diff --git a/src/test/ui/proc-macro/proc-macro-gates2.stderr b/src/test/ui/proc-macro/proc-macro-gates2.stderr
index 8eeca99ab39..88847193884 100644
--- a/src/test/ui/proc-macro/proc-macro-gates2.stderr
+++ b/src/test/ui/proc-macro/proc-macro-gates2.stderr
@@ -5,7 +5,7 @@ LL | fn _test6<#[empty_attr] T>() {}
    |           ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `empty_attr` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/proc-macro-gates2.rs:17:9
@@ -14,7 +14,7 @@ LL |         #[empty_attr]
    |         ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/proc-macro/resolve-error.stderr b/src/test/ui/proc-macro/resolve-error.stderr
index f9f116c15dc..02cf7cdb964 100644
--- a/src/test/ui/proc-macro/resolve-error.stderr
+++ b/src/test/ui/proc-macro/resolve-error.stderr
@@ -5,7 +5,7 @@ LL | #[attr_proc_macra]
    |   ^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `FooWithLongNan` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/resolve-error.rs:31:3
@@ -14,7 +14,7 @@ LL | #[FooWithLongNan]
    |   ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: cannot find derive macro `FooWithLongNan` in this scope
   --> $DIR/resolve-error.rs:22:10
diff --git a/src/test/ui/recursion/recursion.stderr b/src/test/ui/recursion/recursion.stderr
index 9213ba052a9..751d56b70f1 100644
--- a/src/test/ui/recursion/recursion.stderr
+++ b/src/test/ui/recursion/recursion.stderr
@@ -1,4 +1,4 @@
-error: reached the recursion limit while instantiating `test::<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Nil>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
+error: reached the recursion limit while instantiating `test::<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Cons<Nil>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
   --> $DIR/recursion.rs:12:1
    |
 LL | / fn test<T:Dot> (n:isize, i:isize, first:T, second:T) ->isize {
diff --git a/src/test/ui/reserved/reserved-attr-on-macro.stderr b/src/test/ui/reserved/reserved-attr-on-macro.stderr
index 0c62c82017e..cbd111b47bf 100644
--- a/src/test/ui/reserved/reserved-attr-on-macro.stderr
+++ b/src/test/ui/reserved/reserved-attr-on-macro.stderr
@@ -5,7 +5,7 @@ LL | #[rustc_attribute_should_be_reserved]
    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error[E0658]: The attribute `rustc_attribute_should_be_reserved` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/reserved-attr-on-macro.rs:1:3
@@ -14,7 +14,7 @@ LL | #[rustc_attribute_should_be_reserved]
    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: cannot determine resolution for the macro `foo`
   --> $DIR/reserved-attr-on-macro.rs:10:5
diff --git a/src/test/ui/rfc-2497-if-let-chains/feature-gate.stderr b/src/test/ui/rfc-2497-if-let-chains/feature-gate.stderr
index 6167427fa9f..abe200944b9 100644
--- a/src/test/ui/rfc-2497-if-let-chains/feature-gate.stderr
+++ b/src/test/ui/rfc-2497-if-let-chains/feature-gate.stderr
@@ -14,7 +14,7 @@ LL |     if (let 0 = 1) {}
    |         ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:18:11
@@ -23,7 +23,7 @@ LL |     if (((let 0 = 1))) {}
    |           ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:22:16
@@ -32,7 +32,7 @@ LL |     if true && let 0 = 1 {}
    |                ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:26:8
@@ -41,7 +41,7 @@ LL |     if let 0 = 1 && true {}
    |        ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:30:9
@@ -50,7 +50,7 @@ LL |     if (let 0 = 1) && true {}
    |         ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:34:17
@@ -59,7 +59,7 @@ LL |     if true && (let 0 = 1) {}
    |                 ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:38:9
@@ -68,7 +68,7 @@ LL |     if (let 0 = 1) && (let 0 = 1) {}
    |         ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:38:24
@@ -77,7 +77,7 @@ LL |     if (let 0 = 1) && (let 0 = 1) {}
    |                        ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:44:8
@@ -86,7 +86,7 @@ LL |     if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
    |        ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:44:21
@@ -95,7 +95,7 @@ LL |     if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
    |                     ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:44:35
@@ -104,7 +104,7 @@ LL |     if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
    |                                   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:44:48
@@ -113,7 +113,7 @@ LL |     if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
    |                                                ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:44:61
@@ -122,7 +122,7 @@ LL |     if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
    |                                                             ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:56:8
@@ -131,7 +131,7 @@ LL |     if let Range { start: _, end: _ } = (true..true) && false {}
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:64:12
@@ -140,7 +140,7 @@ LL |     while (let 0 = 1) {}
    |            ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:68:14
@@ -149,7 +149,7 @@ LL |     while (((let 0 = 1))) {}
    |              ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:72:19
@@ -158,7 +158,7 @@ LL |     while true && let 0 = 1 {}
    |                   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:76:11
@@ -167,7 +167,7 @@ LL |     while let 0 = 1 && true {}
    |           ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:80:12
@@ -176,7 +176,7 @@ LL |     while (let 0 = 1) && true {}
    |            ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:84:20
@@ -185,7 +185,7 @@ LL |     while true && (let 0 = 1) {}
    |                    ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:88:12
@@ -194,7 +194,7 @@ LL |     while (let 0 = 1) && (let 0 = 1) {}
    |            ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:88:27
@@ -203,7 +203,7 @@ LL |     while (let 0 = 1) && (let 0 = 1) {}
    |                           ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:94:11
@@ -212,7 +212,7 @@ LL |     while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {
    |           ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:94:24
@@ -221,7 +221,7 @@ LL |     while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {
    |                        ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:94:38
@@ -230,7 +230,7 @@ LL |     while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {
    |                                      ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:94:51
@@ -239,7 +239,7 @@ LL |     while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {
    |                                                   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:94:64
@@ -248,7 +248,7 @@ LL |     while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {
    |                                                                ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:106:11
@@ -257,7 +257,7 @@ LL |     while let Range { start: _, end: _ } = (true..true) && false {}
    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:129:20
@@ -266,7 +266,7 @@ LL |     #[cfg(FALSE)] (let 0 = 1);
    |                    ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:114:17
@@ -275,7 +275,7 @@ LL |     noop_expr!((let 0 = 1));
    |                 ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:123:16
@@ -284,7 +284,7 @@ LL |     use_expr!((let 0 = 1 && 0 == 0));
    |                ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error[E0658]: `let` expressions in this position are experimental
   --> $DIR/feature-gate.rs:126:16
@@ -293,7 +293,7 @@ LL |     use_expr!((let 0 = 1));
    |                ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/53667
-   = help: add #![feature(let_chains)] to the crate attributes to enable
+   = help: add `#![feature(let_chains)]` to the crate attributes to enable
 
 error: `let` expressions are not supported here
   --> $DIR/feature-gate.rs:14:9
diff --git a/src/test/ui/rfc-2565-param-attrs/param-attrs-builtin-attrs.stderr b/src/test/ui/rfc-2565-param-attrs/param-attrs-builtin-attrs.stderr
index e6f3efc04ce..a4db4b6207d 100644
--- a/src/test/ui/rfc-2565-param-attrs/param-attrs-builtin-attrs.stderr
+++ b/src/test/ui/rfc-2565-param-attrs/param-attrs-builtin-attrs.stderr
@@ -269,7 +269,7 @@ LL |         #[test] a: i32,
    |         ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `test` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/param-attrs-builtin-attrs.rs:23:5
@@ -278,7 +278,7 @@ LL |     #[test] a: u32,
    |     ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `test` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/param-attrs-builtin-attrs.rs:38:5
@@ -287,7 +287,7 @@ LL |     #[test] a: u32,
    |     ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `test` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/param-attrs-builtin-attrs.rs:58:9
@@ -296,7 +296,7 @@ LL |         #[test] a: i32,
    |         ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `test` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/param-attrs-builtin-attrs.rs:79:9
@@ -305,7 +305,7 @@ LL |         #[test] a: i32,
    |         ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `test` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/param-attrs-builtin-attrs.rs:98:9
@@ -314,7 +314,7 @@ LL |         #[test] a: i32,
    |         ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `test` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/param-attrs-builtin-attrs.rs:117:9
@@ -323,7 +323,7 @@ LL |         #[test] a: i32,
    |         ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `test` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/param-attrs-builtin-attrs.rs:134:9
@@ -332,7 +332,7 @@ LL |         #[test] a: u32,
    |         ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 52 previous errors
 
diff --git a/src/test/ui/rfc-2565-param-attrs/param-attrs-feature-gate.stderr b/src/test/ui/rfc-2565-param-attrs/param-attrs-feature-gate.stderr
index 82f21e7fdbc..704c41f0fa6 100644
--- a/src/test/ui/rfc-2565-param-attrs/param-attrs-feature-gate.stderr
+++ b/src/test/ui/rfc-2565-param-attrs/param-attrs-feature-gate.stderr
@@ -11,7 +11,7 @@ LL |     /// Foo
    |     ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60406
-   = help: add #![feature(param_attrs)] to the crate attributes to enable
+   = help: add `#![feature(param_attrs)]` to the crate attributes to enable
 
 error[E0658]: attributes on function parameters are unstable
   --> $DIR/param-attrs-feature-gate.rs:9:5
@@ -20,7 +20,7 @@ LL |     #[allow(C)] a: u8
    |     ^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/60406
-   = help: add #![feature(param_attrs)] to the crate attributes to enable
+   = help: add `#![feature(param_attrs)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/rfc1445/feature-gate.no_gate.stderr b/src/test/ui/rfc1445/feature-gate.no_gate.stderr
index 3a2014fab09..fa879371628 100644
--- a/src/test/ui/rfc1445/feature-gate.no_gate.stderr
+++ b/src/test/ui/rfc1445/feature-gate.no_gate.stderr
@@ -5,7 +5,7 @@ LL | #[structural_match]
    | ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/31434
-   = help: add #![feature(structural_match)] to the crate attributes to enable
+   = help: add `#![feature(structural_match)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/rfc1598-generic-associated-types/gat-dont-ice-on-absent-feature.stderr b/src/test/ui/rfc1598-generic-associated-types/gat-dont-ice-on-absent-feature.stderr
index 27b1d73d043..fb43a50df78 100644
--- a/src/test/ui/rfc1598-generic-associated-types/gat-dont-ice-on-absent-feature.stderr
+++ b/src/test/ui/rfc1598-generic-associated-types/gat-dont-ice-on-absent-feature.stderr
@@ -5,7 +5,7 @@ LL |     type Item<'b> = &'b Foo;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44265
-   = help: add #![feature(generic_associated_types)] to the crate attributes to enable
+   = help: add `#![feature(generic_associated_types)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/rust-unstable-column-gated.stderr b/src/test/ui/rust-unstable-column-gated.stderr
index 70b3654b5af..f85122922c8 100644
--- a/src/test/ui/rust-unstable-column-gated.stderr
+++ b/src/test/ui/rust-unstable-column-gated.stderr
@@ -4,7 +4,7 @@ error[E0658]: use of unstable library feature '__rust_unstable_column': internal
 LL |     println!("{}", __rust_unstable_column!());
    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = help: add #![feature(__rust_unstable_column)] to the crate attributes to enable
+   = help: add `#![feature(__rust_unstable_column)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/span/gated-features-attr-spans.stderr b/src/test/ui/span/gated-features-attr-spans.stderr
index 938edbe463f..e0af720187a 100644
--- a/src/test/ui/span/gated-features-attr-spans.stderr
+++ b/src/test/ui/span/gated-features-attr-spans.stderr
@@ -5,7 +5,7 @@ LL | #[repr(simd)]
    | ^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/27731
-   = help: add #![feature(repr_simd)] to the crate attributes to enable
+   = help: add `#![feature(repr_simd)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/span/issue-36530.stderr b/src/test/ui/span/issue-36530.stderr
index ee479d6c791..65f03e756a2 100644
--- a/src/test/ui/span/issue-36530.stderr
+++ b/src/test/ui/span/issue-36530.stderr
@@ -5,7 +5,7 @@ LL | #[foo]
    |   ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: non-builtin inner attributes are unstable
   --> $DIR/issue-36530.rs:5:5
@@ -14,7 +14,7 @@ LL |     #![foo]
    |     ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/54726
-   = help: add #![feature(custom_inner_attributes)] to the crate attributes to enable
+   = help: add `#![feature(custom_inner_attributes)]` to the crate attributes to enable
 
 error[E0658]: The attribute `foo` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/issue-36530.rs:5:8
@@ -23,7 +23,7 @@ LL |     #![foo]
    |        ^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/specialization/defaultimpl/specialization-feature-gate-default.stderr b/src/test/ui/specialization/defaultimpl/specialization-feature-gate-default.stderr
index b95e62edaaa..2cf6c586e41 100644
--- a/src/test/ui/specialization/defaultimpl/specialization-feature-gate-default.stderr
+++ b/src/test/ui/specialization/defaultimpl/specialization-feature-gate-default.stderr
@@ -7,7 +7,7 @@ LL | | }
    | |_^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/31844
-   = help: add #![feature(specialization)] to the crate attributes to enable
+   = help: add `#![feature(specialization)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/specialization/specialization-feature-gate-default.stderr b/src/test/ui/specialization/specialization-feature-gate-default.stderr
index e649f2aa47a..df2ad8a9b26 100644
--- a/src/test/ui/specialization/specialization-feature-gate-default.stderr
+++ b/src/test/ui/specialization/specialization-feature-gate-default.stderr
@@ -5,7 +5,7 @@ LL |     default fn foo(&self) {}
    |     ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/31844
-   = help: add #![feature(specialization)] to the crate attributes to enable
+   = help: add `#![feature(specialization)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/stability-attribute/stability-attribute-issue.stderr b/src/test/ui/stability-attribute/stability-attribute-issue.stderr
index 7e6fbe1600d..3463e77ec7d 100644
--- a/src/test/ui/stability-attribute/stability-attribute-issue.stderr
+++ b/src/test/ui/stability-attribute/stability-attribute-issue.stderr
@@ -5,7 +5,7 @@ LL |     unstable();
    |     ^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/1
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_test_feature': message
   --> $DIR/stability-attribute-issue.rs:10:5
@@ -14,7 +14,7 @@ LL |     unstable_msg();
    |     ^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/2
-   = help: add #![feature(unstable_test_feature)] to the crate attributes to enable
+   = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/stmt_expr_attrs_no_feature.stderr b/src/test/ui/stmt_expr_attrs_no_feature.stderr
index 01372cc164b..b6d0f9ec3d8 100644
--- a/src/test/ui/stmt_expr_attrs_no_feature.stderr
+++ b/src/test/ui/stmt_expr_attrs_no_feature.stderr
@@ -5,7 +5,7 @@ LL |     #[rustfmt::skip]
    |     ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error[E0658]: attributes on expressions are experimental
   --> $DIR/stmt_expr_attrs_no_feature.rs:95:18
@@ -14,7 +14,7 @@ LL |     fn y(a: [u8; #[rustc_dummy] 5]);
    |                  ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error[E0658]: attributes on expressions are experimental
   --> $DIR/stmt_expr_attrs_no_feature.rs:102:19
@@ -23,7 +23,7 @@ LL |     const Y: u8 = #[rustc_dummy] 5;
    |                   ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error[E0658]: attributes on expressions are experimental
   --> $DIR/stmt_expr_attrs_no_feature.rs:108:19
@@ -32,7 +32,7 @@ LL |     const Y: [u8; #[rustc_dummy] 5];
    |                   ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error[E0658]: attributes on expressions are experimental
   --> $DIR/stmt_expr_attrs_no_feature.rs:114:18
@@ -41,7 +41,7 @@ LL |     field2: [u8; #[rustc_dummy] 5]
    |                  ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error[E0658]: attributes on expressions are experimental
   --> $DIR/stmt_expr_attrs_no_feature.rs:119:10
@@ -50,7 +50,7 @@ LL |     [u8; #[rustc_dummy] 5]
    |          ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error[E0658]: attributes on expressions are experimental
   --> $DIR/stmt_expr_attrs_no_feature.rs:125:14
@@ -59,7 +59,7 @@ LL |         [u8; #[rustc_dummy] 5]
    |              ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error[E0658]: attributes on expressions are experimental
   --> $DIR/stmt_expr_attrs_no_feature.rs:130:22
@@ -68,7 +68,7 @@ LL |         field2: [u8; #[rustc_dummy] 5]
    |                      ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error[E0658]: attributes on expressions are experimental
   --> $DIR/stmt_expr_attrs_no_feature.rs:138:14
@@ -77,7 +77,7 @@ LL |         6 => #[rustc_dummy] (),
    |              ^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/15701
-   = help: add #![feature(stmt_expr_attributes)] to the crate attributes to enable
+   = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
 
 error: aborting due to 9 previous errors
 
diff --git a/src/test/ui/suggestions/attribute-typos.stderr b/src/test/ui/suggestions/attribute-typos.stderr
index 958688b4d39..7c28e882728 100644
--- a/src/test/ui/suggestions/attribute-typos.stderr
+++ b/src/test/ui/suggestions/attribute-typos.stderr
@@ -5,7 +5,7 @@ LL | #[rustc_err]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(rustc_attrs)] to the crate attributes to enable
+   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error[E0658]: The attribute `rustc_err` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/attribute-typos.rs:7:3
@@ -14,7 +14,7 @@ LL | #[rustc_err]
    |   ^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `tests` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/attribute-typos.rs:4:3
@@ -23,7 +23,7 @@ LL | #[tests]
    |   ^^^^^ help: a built-in attribute with a similar name exists: `test`
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error[E0658]: The attribute `deprcated` is currently unknown to the compiler and may have meaning added to it in the future
   --> $DIR/attribute-typos.rs:1:3
@@ -32,7 +32,7 @@ LL | #[deprcated]
    |   ^^^^^^^^^ help: a built-in attribute with a similar name exists: `deprecated`
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: aborting due to 4 previous errors
 
diff --git a/src/test/ui/syntax-trait-polarity-feature-gate.stderr b/src/test/ui/syntax-trait-polarity-feature-gate.stderr
index 86b4bc1157b..c546bc4ef7e 100644
--- a/src/test/ui/syntax-trait-polarity-feature-gate.stderr
+++ b/src/test/ui/syntax-trait-polarity-feature-gate.stderr
@@ -5,7 +5,7 @@ LL | impl !Send for TestType {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/13231
-   = help: add #![feature(optin_builtin_traits)] to the crate attributes to enable
+   = help: add `#![feature(optin_builtin_traits)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/target-feature-gate.stderr b/src/test/ui/target-feature-gate.stderr
index c7adba868ea..9f17110b6d8 100644
--- a/src/test/ui/target-feature-gate.stderr
+++ b/src/test/ui/target-feature-gate.stderr
@@ -5,7 +5,7 @@ LL | #[target_feature(enable = "avx512bw")]
    |                  ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/44839
-   = help: add #![feature(avx512_target_feature)] to the crate attributes to enable
+   = help: add `#![feature(avx512_target_feature)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/tool-attributes/tool-attributes-misplaced-1.stderr b/src/test/ui/tool-attributes/tool-attributes-misplaced-1.stderr
index 1df9821f244..32c9a1e8b6e 100644
--- a/src/test/ui/tool-attributes/tool-attributes-misplaced-1.stderr
+++ b/src/test/ui/tool-attributes/tool-attributes-misplaced-1.stderr
@@ -5,7 +5,7 @@ LL | #[rustfmt]
    |   ^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
-   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+   = help: add `#![feature(custom_attribute)]` to the crate attributes to enable
 
 error: cannot find derive macro `rustfmt` in this scope
   --> $DIR/tool-attributes-misplaced-1.rs:4:10
diff --git a/src/test/ui/trace_macros-gate.stderr b/src/test/ui/trace_macros-gate.stderr
index 18745e9ab5a..adf813c162a 100644
--- a/src/test/ui/trace_macros-gate.stderr
+++ b/src/test/ui/trace_macros-gate.stderr
@@ -5,7 +5,7 @@ LL |     trace_macros!();
    |     ^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29598
-   = help: add #![feature(trace_macros)] to the crate attributes to enable
+   = help: add `#![feature(trace_macros)]` to the crate attributes to enable
 
 error: trace_macros! accepts only `true` or `false`
   --> $DIR/trace_macros-gate.rs:4:5
@@ -20,7 +20,7 @@ LL |     trace_macros!(true);
    |     ^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29598
-   = help: add #![feature(trace_macros)] to the crate attributes to enable
+   = help: add `#![feature(trace_macros)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'trace_macros': `trace_macros` is not stable enough for use and is subject to change
   --> $DIR/trace_macros-gate.rs:7:5
@@ -29,7 +29,7 @@ LL |     trace_macros!(false);
    |     ^^^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29598
-   = help: add #![feature(trace_macros)] to the crate attributes to enable
+   = help: add `#![feature(trace_macros)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'trace_macros': `trace_macros` is not stable enough for use and is subject to change
   --> $DIR/trace_macros-gate.rs:10:26
@@ -41,7 +41,7 @@ LL |     expando!(true);
    |     --------------- in this macro invocation
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29598
-   = help: add #![feature(trace_macros)] to the crate attributes to enable
+   = help: add `#![feature(trace_macros)]` to the crate attributes to enable
 
 error: aborting due to 5 previous errors
 
diff --git a/src/test/ui/type-alias/issue-62263-self-in-atb.rs b/src/test/ui/type-alias/issue-62263-self-in-atb.rs
new file mode 100644
index 00000000000..5e812db4d23
--- /dev/null
+++ b/src/test/ui/type-alias/issue-62263-self-in-atb.rs
@@ -0,0 +1,8 @@
+pub trait Trait {
+    type A;
+}
+
+pub type Alias = dyn Trait<A = Self::A>;
+//~^ ERROR failed to resolve: use of undeclared type or module `Self` [E0433]
+
+fn main() {}
diff --git a/src/test/ui/type-alias/issue-62263-self-in-atb.stderr b/src/test/ui/type-alias/issue-62263-self-in-atb.stderr
new file mode 100644
index 00000000000..a642d029f93
--- /dev/null
+++ b/src/test/ui/type-alias/issue-62263-self-in-atb.stderr
@@ -0,0 +1,9 @@
+error[E0433]: failed to resolve: use of undeclared type or module `Self`
+  --> $DIR/issue-62263-self-in-atb.rs:5:32
+   |
+LL | pub type Alias = dyn Trait<A = Self::A>;
+   |                                ^^^^ use of undeclared type or module `Self`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0433`.
diff --git a/src/test/ui/type-alias/issue-62305-self-assoc-ty.rs b/src/test/ui/type-alias/issue-62305-self-assoc-ty.rs
new file mode 100644
index 00000000000..0b95ddeb19e
--- /dev/null
+++ b/src/test/ui/type-alias/issue-62305-self-assoc-ty.rs
@@ -0,0 +1,4 @@
+type Alias = Self::Target;
+//~^ ERROR failed to resolve: use of undeclared type or module `Self` [E0433]
+
+fn main() {}
diff --git a/src/test/ui/type-alias/issue-62305-self-assoc-ty.stderr b/src/test/ui/type-alias/issue-62305-self-assoc-ty.stderr
new file mode 100644
index 00000000000..6eb445e9dbc
--- /dev/null
+++ b/src/test/ui/type-alias/issue-62305-self-assoc-ty.stderr
@@ -0,0 +1,9 @@
+error[E0433]: failed to resolve: use of undeclared type or module `Self`
+  --> $DIR/issue-62305-self-assoc-ty.rs:1:14
+   |
+LL | type Alias = Self::Target;
+   |              ^^^^ use of undeclared type or module `Self`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0433`.
diff --git a/src/test/ui/type-alias/issue-62364-self-ty-arg.rs b/src/test/ui/type-alias/issue-62364-self-ty-arg.rs
new file mode 100644
index 00000000000..bebb4a9021a
--- /dev/null
+++ b/src/test/ui/type-alias/issue-62364-self-ty-arg.rs
@@ -0,0 +1,8 @@
+struct Struct<P1> {
+    field: P1,
+}
+
+type Alias<'a> = Struct<&'a Self>;
+//~^ ERROR cannot find type `Self` in this scope [E0411]
+
+fn main() {}
diff --git a/src/test/ui/type-alias/issue-62364-self-ty-arg.stderr b/src/test/ui/type-alias/issue-62364-self-ty-arg.stderr
new file mode 100644
index 00000000000..5ed27760a82
--- /dev/null
+++ b/src/test/ui/type-alias/issue-62364-self-ty-arg.stderr
@@ -0,0 +1,9 @@
+error[E0411]: cannot find type `Self` in this scope
+  --> $DIR/issue-62364-self-ty-arg.rs:5:29
+   |
+LL | type Alias<'a> = Struct<&'a Self>;
+   |                             ^^^^ `Self` is only available in impls, traits, and type definitions
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0411`.
diff --git a/src/test/ui/unboxed-closures/unboxed-closure-feature-gate.stderr b/src/test/ui/unboxed-closures/unboxed-closure-feature-gate.stderr
index c23acbcb311..a76954287e4 100644
--- a/src/test/ui/unboxed-closures/unboxed-closure-feature-gate.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closure-feature-gate.stderr
@@ -5,7 +5,7 @@ LL |     let x: Box<dyn Foo(isize)>;
    |                    ^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/unboxed-closures/unboxed-closure-sugar-not-used-on-fn.stderr b/src/test/ui/unboxed-closures/unboxed-closure-sugar-not-used-on-fn.stderr
index e1ed85d4f46..c116728190f 100644
--- a/src/test/ui/unboxed-closures/unboxed-closure-sugar-not-used-on-fn.stderr
+++ b/src/test/ui/unboxed-closures/unboxed-closure-sugar-not-used-on-fn.stderr
@@ -5,7 +5,7 @@ LL | fn bar1(x: &dyn Fn<(), Output=()>) {
    |                 ^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change. Use parenthetical notation (Fn(Foo, Bar) -> Baz) instead
   --> $DIR/unboxed-closure-sugar-not-used-on-fn.rs:7:28
@@ -14,7 +14,7 @@ LL | fn bar2<T>(x: &T) where T: Fn<()> {
    |                            ^^^^^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
-   = help: add #![feature(unboxed_closures)] to the crate attributes to enable
+   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/utf8_idents.stderr b/src/test/ui/utf8_idents.stderr
index b65848cc58f..df9910f191c 100644
--- a/src/test/ui/utf8_idents.stderr
+++ b/src/test/ui/utf8_idents.stderr
@@ -5,7 +5,7 @@ LL |     'β,
    |     ^^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/utf8_idents.rs:3:5
@@ -14,7 +14,7 @@ LL |     γ
    |     ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/utf8_idents.rs:8:5
@@ -23,7 +23,7 @@ LL |     δ: usize
    |     ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 error[E0658]: non-ascii idents are not fully supported
   --> $DIR/utf8_idents.rs:12:9
@@ -32,7 +32,7 @@ LL |     let α = 0.00001f64;
    |         ^
    |
    = note: for more information, see https://github.com/rust-lang/rust/issues/55467
-   = help: add #![feature(non_ascii_idents)] to the crate attributes to enable
+   = help: add `#![feature(non_ascii_idents)]` to the crate attributes to enable
 
 warning: type parameter `γ` should have an upper camel case name
   --> $DIR/utf8_idents.rs:3:5
diff --git a/src/tools/publish_toolstate.py b/src/tools/publish_toolstate.py
index 3f876b04fbe..8f9061d7c18 100755
--- a/src/tools/publish_toolstate.py
+++ b/src/tools/publish_toolstate.py
@@ -28,7 +28,7 @@ MAINTAINERS = {
         '@ryankurte @thejpster @therealprof'
     ),
     'edition-guide': '@ehuss @Centril @steveklabnik',
-    'rustc-guide': '@mark-i-m'
+    'rustc-guide': '@mark-i-m @spastorino'
 }
 
 REPOS = {