Auto merge of #59076 - dtolnay:comma, r=alexcrichton

Include trailing comma in multiline Debug representation

This PR changes the behavior of [`Formatter::debug_struct`](https://doc.rust-lang.org/std/fmt/struct.Formatter.html#method.debug_struct), [`debug_tuple`](https://doc.rust-lang.org/std/fmt/struct.Formatter.html#method.debug_tuple), [`debug_list`](https://doc.rust-lang.org/std/fmt/struct.Formatter.html#method.debug_list), [`debug_set`](https://doc.rust-lang.org/std/fmt/struct.Formatter.html#method.debug_set), and [`debug_map`](https://doc.rust-lang.org/std/fmt/struct.Formatter.html#method.debug_map) to render trailing commas in `{:#?}` mode, which is the dominant style in modern Rust code.

#### Before:

```console
Language {
    name: "Rust",
    trailing_commas: false
}
```

#### After:

```console
Language {
    name: "Rust",
    trailing_commas: true,
}
```

28 files changed, 226 insertions, 252 deletions

diff --git a/src/libcore/fmt/builders.rs b/src/libcore/fmt/builders.rs
index 45994c2b4f0..df3852973b8 100644
--- a/src/libcore/fmt/builders.rs
+++ b/src/libcore/fmt/builders.rs
@@ -11,7 +11,7 @@ impl<'a> PadAdapter<'a> {
         fmt.wrap_buf(move |buf| {
             *slot = Some(PadAdapter {
                 buf,
-                on_newline: false,
+                on_newline: true,
             });
             slot.as_mut().unwrap()
         })
@@ -128,22 +128,21 @@ impl<'a, 'b: 'a> DebugStruct<'a, 'b> {
     #[stable(feature = "debug_builders", since = "1.2.0")]
     pub fn field(&mut self, name: &str, value: &dyn fmt::Debug) -> &mut DebugStruct<'a, 'b> {
         self.result = self.result.and_then(|_| {
-            let prefix = if self.has_fields {
-                ","
-            } else {
-                " {"
-            };
-
             if self.is_pretty() {
+                if !self.has_fields {
+                    self.fmt.write_str(" {\n")?;
+                }
                 let mut slot = None;
                 let mut writer = PadAdapter::wrap(&mut self.fmt, &mut slot);
-                writer.write_str(prefix)?;
-                writer.write_str("\n")?;
                 writer.write_str(name)?;
                 writer.write_str(": ")?;
-                value.fmt(&mut writer)
+                value.fmt(&mut writer)?;
+                writer.write_str(",\n")
             } else {
-                write!(self.fmt, "{} {}: ", prefix, name)?;
+                let prefix = if self.has_fields { ", " } else { " { " };
+                self.fmt.write_str(prefix)?;
+                self.fmt.write_str(name)?;
+                self.fmt.write_str(": ")?;
                 value.fmt(self.fmt)
             }
         });
@@ -184,7 +183,7 @@ impl<'a, 'b: 'a> DebugStruct<'a, 'b> {
         if self.has_fields {
             self.result = self.result.and_then(|_| {
                 if self.is_pretty() {
-                    self.fmt.write_str("\n}")
+                    self.fmt.write_str("}")
                 } else {
                     self.fmt.write_str(" }")
                 }
@@ -275,21 +274,17 @@ impl<'a, 'b: 'a> DebugTuple<'a, 'b> {
     #[stable(feature = "debug_builders", since = "1.2.0")]
     pub fn field(&mut self, value: &dyn fmt::Debug) -> &mut DebugTuple<'a, 'b> {
         self.result = self.result.and_then(|_| {
-            let (prefix, space) = if self.fields > 0 {
-                (",", " ")
-            } else {
-                ("(", "")
-            };
-
             if self.is_pretty() {
+                if self.fields == 0 {
+                    self.fmt.write_str("(\n")?;
+                }
                 let mut slot = None;
                 let mut writer = PadAdapter::wrap(&mut self.fmt, &mut slot);
-                writer.write_str(prefix)?;
-                writer.write_str("\n")?;
-                value.fmt(&mut writer)
+                value.fmt(&mut writer)?;
+                writer.write_str(",\n")
             } else {
+                let prefix = if self.fields == 0 { "(" } else { ", " };
                 self.fmt.write_str(prefix)?;
-                self.fmt.write_str(space)?;
                 value.fmt(self.fmt)
             }
         });
@@ -326,10 +321,7 @@ impl<'a, 'b: 'a> DebugTuple<'a, 'b> {
     pub fn finish(&mut self) -> fmt::Result {
         if self.fields > 0 {
             self.result = self.result.and_then(|_| {
-                if self.is_pretty() {
-                    self.fmt.write_str("\n")?;
-                }
-                if self.fields == 1 && self.empty_name {
+                if self.fields == 1 && self.empty_name && !self.is_pretty() {
                     self.fmt.write_str(",")?;
                 }
                 self.fmt.write_str(")")
@@ -353,14 +345,13 @@ impl<'a, 'b: 'a> DebugInner<'a, 'b> {
     fn entry(&mut self, entry: &dyn fmt::Debug) {
         self.result = self.result.and_then(|_| {
             if self.is_pretty() {
+                if !self.has_fields {
+                    self.fmt.write_str("\n")?;
+                }
                 let mut slot = None;
                 let mut writer = PadAdapter::wrap(&mut self.fmt, &mut slot);
-                writer.write_str(if self.has_fields {
-                    ",\n"
-                } else {
-                    "\n"
-                })?;
-                entry.fmt(&mut writer)
+                entry.fmt(&mut writer)?;
+                writer.write_str(",\n")
             } else {
                 if self.has_fields {
                     self.fmt.write_str(", ")?
@@ -372,15 +363,6 @@ impl<'a, 'b: 'a> DebugInner<'a, 'b> {
         self.has_fields = true;
     }
 
-    pub fn finish(&mut self) {
-        let prefix = if self.is_pretty() && self.has_fields {
-            "\n"
-        } else {
-            ""
-        };
-        self.result = self.result.and_then(|_| self.fmt.write_str(prefix));
-    }
-
     fn is_pretty(&self) -> bool {
         self.fmt.alternate()
     }
@@ -421,7 +403,7 @@ pub struct DebugSet<'a, 'b: 'a> {
 }
 
 pub fn debug_set_new<'a, 'b>(fmt: &'a mut fmt::Formatter<'b>) -> DebugSet<'a, 'b> {
-    let result = write!(fmt, "{{");
+    let result = fmt.write_str("{");
     DebugSet {
         inner: DebugInner {
             fmt,
@@ -519,7 +501,6 @@ impl<'a, 'b: 'a> DebugSet<'a, 'b> {
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
     pub fn finish(&mut self) -> fmt::Result {
-        self.inner.finish();
         self.inner.result.and_then(|_| self.inner.fmt.write_str("}"))
     }
 }
@@ -559,7 +540,7 @@ pub struct DebugList<'a, 'b: 'a> {
 }
 
 pub fn debug_list_new<'a, 'b>(fmt: &'a mut fmt::Formatter<'b>) -> DebugList<'a, 'b> {
-    let result = write!(fmt, "[");
+    let result = fmt.write_str("[");
     DebugList {
         inner: DebugInner {
             fmt,
@@ -657,7 +638,6 @@ impl<'a, 'b: 'a> DebugList<'a, 'b> {
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
     pub fn finish(&mut self) -> fmt::Result {
-        self.inner.finish();
         self.inner.result.and_then(|_| self.inner.fmt.write_str("]"))
     }
 }
@@ -699,7 +679,7 @@ pub struct DebugMap<'a, 'b: 'a> {
 }
 
 pub fn debug_map_new<'a, 'b>(fmt: &'a mut fmt::Formatter<'b>) -> DebugMap<'a, 'b> {
-    let result = write!(fmt, "{{");
+    let result = fmt.write_str("{");
     DebugMap {
         fmt,
         result,
@@ -734,16 +714,15 @@ impl<'a, 'b: 'a> DebugMap<'a, 'b> {
     pub fn entry(&mut self, key: &dyn fmt::Debug, value: &dyn fmt::Debug) -> &mut DebugMap<'a, 'b> {
         self.result = self.result.and_then(|_| {
             if self.is_pretty() {
+                if !self.has_fields {
+                    self.fmt.write_str("\n")?;
+                }
                 let mut slot = None;
                 let mut writer = PadAdapter::wrap(&mut self.fmt, &mut slot);
-                writer.write_str(if self.has_fields {
-                    ",\n"
-                } else {
-                    "\n"
-                })?;
                 key.fmt(&mut writer)?;
                 writer.write_str(": ")?;
-                value.fmt(&mut writer)
+                value.fmt(&mut writer)?;
+                writer.write_str(",\n")
             } else {
                 if self.has_fields {
                     self.fmt.write_str(", ")?
@@ -818,12 +797,7 @@ impl<'a, 'b: 'a> DebugMap<'a, 'b> {
     /// ```
     #[stable(feature = "debug_builders", since = "1.2.0")]
     pub fn finish(&mut self) -> fmt::Result {
-        let prefix = if self.is_pretty() && self.has_fields {
-            "\n"
-        } else {
-            ""
-        };
-        self.result.and_then(|_| write!(self.fmt, "{}}}", prefix))
+        self.result.and_then(|_| self.fmt.write_str("}"))
     }
 
     fn is_pretty(&self) -> bool {
diff --git a/src/libcore/tests/fmt/builders.rs b/src/libcore/tests/fmt/builders.rs
index fd7192cc151..e4b75fe1fa2 100644
--- a/src/libcore/tests/fmt/builders.rs
+++ b/src/libcore/tests/fmt/builders.rs
@@ -30,7 +30,7 @@ mod debug_struct {
         assert_eq!("Foo { bar: true }", format!("{:?}", Foo));
         assert_eq!(
 "Foo {
-    bar: true
+    bar: true,
 }",
                    format!("{:#?}", Foo));
     }
@@ -52,7 +52,7 @@ mod debug_struct {
         assert_eq!(
 "Foo {
     bar: true,
-    baz: 10/20
+    baz: 10/20,
 }",
                    format!("{:#?}", Foo));
     }
@@ -87,9 +87,9 @@ mod debug_struct {
 "Bar {
     foo: Foo {
         bar: true,
-        baz: 10/20
+        baz: 10/20,
     },
-    hello: \"world\"
+    hello: \"world\",
 }",
                    format!("{:#?}", Bar));
     }
@@ -127,7 +127,7 @@ mod debug_tuple {
         assert_eq!("Foo(true)", format!("{:?}", Foo));
         assert_eq!(
 "Foo(
-    true
+    true,
 )",
                    format!("{:#?}", Foo));
     }
@@ -149,7 +149,7 @@ mod debug_tuple {
         assert_eq!(
 "Foo(
     true,
-    10/20
+    10/20,
 )",
                    format!("{:#?}", Foo));
     }
@@ -184,9 +184,9 @@ mod debug_tuple {
 "Bar(
     Foo(
         true,
-        10/20
+        10/20,
     ),
-    \"world\"
+    \"world\",
 )",
                    format!("{:#?}", Bar));
     }
@@ -224,7 +224,7 @@ mod debug_map {
         assert_eq!("{\"bar\": true}", format!("{:?}", Foo));
         assert_eq!(
 "{
-    \"bar\": true
+    \"bar\": true,
 }",
                    format!("{:#?}", Foo));
     }
@@ -246,7 +246,7 @@ mod debug_map {
         assert_eq!(
 "{
     \"bar\": true,
-    10: 10/20
+    10: 10/20,
 }",
                    format!("{:#?}", Foo));
     }
@@ -282,12 +282,12 @@ mod debug_map {
 "{
     \"foo\": {
         \"bar\": true,
-        10: 10/20
+        10: 10/20,
     },
     {
         \"bar\": true,
-        10: 10/20
-    }: \"world\"
+        10: 10/20,
+    }: \"world\",
 }",
                    format!("{:#?}", Bar));
     }
@@ -325,7 +325,7 @@ mod debug_set {
         assert_eq!("{true}", format!("{:?}", Foo));
         assert_eq!(
 "{
-    true
+    true,
 }",
                    format!("{:#?}", Foo));
     }
@@ -347,7 +347,7 @@ mod debug_set {
         assert_eq!(
 "{
     true,
-    10/20
+    10/20,
 }",
                    format!("{:#?}", Foo));
     }
@@ -382,9 +382,9 @@ mod debug_set {
 "{
     {
         true,
-        10/20
+        10/20,
     },
-    \"world\"
+    \"world\",
 }",
                    format!("{:#?}", Bar));
     }
@@ -422,7 +422,7 @@ mod debug_list {
         assert_eq!("[true]", format!("{:?}", Foo));
         assert_eq!(
 "[
-    true
+    true,
 ]",
                    format!("{:#?}", Foo));
     }
@@ -444,7 +444,7 @@ mod debug_list {
         assert_eq!(
 "[
     true,
-    10/20
+    10/20,
 ]",
                    format!("{:#?}", Foo));
     }
@@ -479,9 +479,9 @@ mod debug_list {
 "[
     [
         true,
-        10/20
+        10/20,
     ],
-    \"world\"
+    \"world\",
 ]",
                    format!("{:#?}", Bar));
     }
@@ -513,31 +513,31 @@ fn test_formatting_parameters_are_forwarded() {
     assert_eq!(format!("{:#03?}", struct_), "
 Foo {
     bar: 1024,
-    baz: 007
+    baz: 007,
 }
     ".trim());
     assert_eq!(format!("{:#03?}", tuple), "
 (
     1024,
-    007
+    007,
 )
     ".trim());
     assert_eq!(format!("{:#03?}", list), "
 [
     1024,
-    007
+    007,
 ]
     ".trim());
     assert_eq!(format!("{:#03?}", map), r#"
 {
     "bar": 1024,
-    "baz": 007
+    "baz": 007,
 }
     "#.trim());
     assert_eq!(format!("{:#03?}", set), "
 {
     007,
-    1024
+    1024,
 }
     ".trim());
 }
diff --git a/src/test/ui/nll/closure-requirements/escape-argument-callee.stderr b/src/test/ui/nll/closure-requirements/escape-argument-callee.stderr
index 46de13dbbbd..20041389b3c 100644
--- a/src/test/ui/nll/closure-requirements/escape-argument-callee.stderr
+++ b/src/test/ui/nll/closure-requirements/escape-argument-callee.stderr
@@ -6,7 +6,7 @@ LL |         let mut closure = expect_sig(|p, y| *p = y);
    |
    = note: defining type: DefId(0/1:9 ~ escape_argument_callee[317d]::test[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's, 't0> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) mut &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) i32, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) i32))
+               for<'r, 's, 't0> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) mut &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) i32, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) i32)),
            ]
 
 error: lifetime may not live long enough
diff --git a/src/test/ui/nll/closure-requirements/escape-argument.stderr b/src/test/ui/nll/closure-requirements/escape-argument.stderr
index d47b326f48e..b08ec953931 100644
--- a/src/test/ui/nll/closure-requirements/escape-argument.stderr
+++ b/src/test/ui/nll/closure-requirements/escape-argument.stderr
@@ -6,7 +6,7 @@ LL |         let mut closure = expect_sig(|p, y| *p = y);
    |
    = note: defining type: DefId(0/1:9 ~ escape_argument[317d]::test[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) mut &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) i32, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) i32))
+               for<'r, 's> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) mut &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) i32, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) i32)),
            ]
 
 note: No external requirements
diff --git a/src/test/ui/nll/closure-requirements/escape-upvar-nested.stderr b/src/test/ui/nll/closure-requirements/escape-upvar-nested.stderr
index dec4a6b811f..7178b22bb5f 100644
--- a/src/test/ui/nll/closure-requirements/escape-upvar-nested.stderr
+++ b/src/test/ui/nll/closure-requirements/escape-upvar-nested.stderr
@@ -8,7 +8,7 @@ LL |             let mut closure1 = || p = &y;
                i16,
                extern "rust-call" fn(()),
                &'_#1r mut &'_#2r i32,
-               &'_#3r i32
+               &'_#3r i32,
            ]
    = note: number of external vids: 4
    = note: where '_#3r: '_#2r
@@ -27,7 +27,7 @@ LL | |         };
                i16,
                extern "rust-call" fn(()),
                &'_#1r mut &'_#2r i32,
-               &'_#3r i32
+               &'_#3r i32,
            ]
    = note: number of external vids: 4
    = note: where '_#3r: '_#2r
diff --git a/src/test/ui/nll/closure-requirements/escape-upvar-ref.stderr b/src/test/ui/nll/closure-requirements/escape-upvar-ref.stderr
index 55ede6ed4aa..d129f945f25 100644
--- a/src/test/ui/nll/closure-requirements/escape-upvar-ref.stderr
+++ b/src/test/ui/nll/closure-requirements/escape-upvar-ref.stderr
@@ -8,7 +8,7 @@ LL |         let mut closure = || p = &y;
                i16,
                extern "rust-call" fn(()),
                &'_#1r mut &'_#2r i32,
-               &'_#3r i32
+               &'_#3r i32,
            ]
    = note: number of external vids: 4
    = note: where '_#3r: '_#2r
diff --git a/src/test/ui/nll/closure-requirements/propagate-approximated-fail-no-postdom.stderr b/src/test/ui/nll/closure-requirements/propagate-approximated-fail-no-postdom.stderr
index 7eb4d96fc5f..4db1f040770 100644
--- a/src/test/ui/nll/closure-requirements/propagate-approximated-fail-no-postdom.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-approximated-fail-no-postdom.stderr
@@ -10,7 +10,7 @@ LL | |         },
    |
    = note: defining type: DefId(0/1:20 ~ propagate_approximated_fail_no_postdom[317d]::supply[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's> extern "rust-call" fn((std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&'_#2r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#3r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>))
+               for<'r, 's> extern "rust-call" fn((std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&'_#2r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#3r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>)),
            ]
    = note: late-bound region is '_#4r
    = note: late-bound region is '_#5r
diff --git a/src/test/ui/nll/closure-requirements/propagate-approximated-ref.stderr b/src/test/ui/nll/closure-requirements/propagate-approximated-ref.stderr
index a1a1024bccd..7dedae715be 100644
--- a/src/test/ui/nll/closure-requirements/propagate-approximated-ref.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-approximated-ref.stderr
@@ -11,7 +11,7 @@ LL | |     });
    |
    = note: defining type: DefId(0/1:18 ~ propagate_approximated_ref[317d]::supply[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's, 't0, 't1, 't2, 't3> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) &'_#2r u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't3)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>))
+               for<'r, 's, 't0, 't1, 't2, 't3> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) &'_#2r u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't3)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>)),
            ]
    = note: late-bound region is '_#3r
    = note: late-bound region is '_#4r
diff --git a/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-comparing-against-free.stderr b/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-comparing-against-free.stderr
index ad2a5cae62e..b2d7fd8df6d 100644
--- a/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-comparing-against-free.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-comparing-against-free.stderr
@@ -10,7 +10,7 @@ LL | |     })
    |
    = note: defining type: DefId(0/1:12 ~ propagate_approximated_shorter_to_static_comparing_against_free[317d]::case1[0]::{{closure}}[0]) with closure substs [
                i32,
-               for<'r> extern "rust-call" fn((std::cell::Cell<&'_#1r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>))
+               for<'r> extern "rust-call" fn((std::cell::Cell<&'_#1r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>)),
            ]
 
 error[E0521]: borrowed data escapes outside of closure
@@ -48,7 +48,7 @@ LL | |     })
    |
    = note: defining type: DefId(0/1:13 ~ propagate_approximated_shorter_to_static_comparing_against_free[317d]::case2[0]::{{closure}}[0]) with closure substs [
                i32,
-               for<'r> extern "rust-call" fn((std::cell::Cell<&'_#1r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>))
+               for<'r> extern "rust-call" fn((std::cell::Cell<&'_#1r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>)),
            ]
    = note: number of external vids: 2
    = note: where '_#1r: '_#0r
diff --git a/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-no-bound.stderr b/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-no-bound.stderr
index f5167c2197b..e30e2dfee63 100644
--- a/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-no-bound.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-no-bound.stderr
@@ -12,7 +12,7 @@ LL | |     });
    |
    = note: defining type: DefId(0/1:18 ~ propagate_approximated_shorter_to_static_no_bound[317d]::supply[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's, 't0, 't1, 't2> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) u32>))
+               for<'r, 's, 't0, 't1, 't2> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) u32>)),
            ]
    = note: late-bound region is '_#2r
    = note: late-bound region is '_#3r
diff --git a/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-wrong-bound.stderr b/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-wrong-bound.stderr
index b4e1b0d2247..ec608590a71 100644
--- a/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-wrong-bound.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-wrong-bound.stderr
@@ -12,7 +12,7 @@ LL | |     });
    |
    = note: defining type: DefId(0/1:18 ~ propagate_approximated_shorter_to_static_wrong_bound[317d]::supply[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's, 't0, 't1, 't2, 't3> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&'_#2r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't3)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>))
+               for<'r, 's, 't0, 't1, 't2, 't3> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&'_#2r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't3)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>)),
            ]
    = note: late-bound region is '_#3r
    = note: late-bound region is '_#4r
diff --git a/src/test/ui/nll/closure-requirements/propagate-approximated-val.stderr b/src/test/ui/nll/closure-requirements/propagate-approximated-val.stderr
index 6ab2104a51c..223c29f5969 100644
--- a/src/test/ui/nll/closure-requirements/propagate-approximated-val.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-approximated-val.stderr
@@ -11,7 +11,7 @@ LL | |     });
    |
    = note: defining type: DefId(0/1:18 ~ propagate_approximated_val[317d]::test[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's> extern "rust-call" fn((std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#2r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>))
+               for<'r, 's> extern "rust-call" fn((std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#2r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>)),
            ]
    = note: late-bound region is '_#3r
    = note: late-bound region is '_#4r
diff --git a/src/test/ui/nll/closure-requirements/propagate-despite-same-free-region.stderr b/src/test/ui/nll/closure-requirements/propagate-despite-same-free-region.stderr
index 79f0df9a688..d618b4d06a1 100644
--- a/src/test/ui/nll/closure-requirements/propagate-despite-same-free-region.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-despite-same-free-region.stderr
@@ -10,7 +10,7 @@ LL | |         },
    |
    = note: defining type: DefId(0/1:16 ~ propagate_despite_same_free_region[317d]::supply[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's> extern "rust-call" fn((std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#2r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>))
+               for<'r, 's> extern "rust-call" fn((std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#2r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>)),
            ]
    = note: late-bound region is '_#3r
    = note: number of external vids: 4
diff --git a/src/test/ui/nll/closure-requirements/propagate-fail-to-approximate-longer-no-bounds.stderr b/src/test/ui/nll/closure-requirements/propagate-fail-to-approximate-longer-no-bounds.stderr
index f8b6bfa003b..07fb4d0d5e3 100644
--- a/src/test/ui/nll/closure-requirements/propagate-fail-to-approximate-longer-no-bounds.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-fail-to-approximate-longer-no-bounds.stderr
@@ -11,7 +11,7 @@ LL | |     });
    |
    = note: defining type: DefId(0/1:18 ~ propagate_fail_to_approximate_longer_no_bounds[317d]::supply[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's, 't0, 't1, 't2> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#1r u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>))
+               for<'r, 's, 't0, 't1, 't2> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#1r u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>)),
            ]
    = note: late-bound region is '_#2r
    = note: late-bound region is '_#3r
diff --git a/src/test/ui/nll/closure-requirements/propagate-fail-to-approximate-longer-wrong-bounds.stderr b/src/test/ui/nll/closure-requirements/propagate-fail-to-approximate-longer-wrong-bounds.stderr
index 7e7429405fa..a0744c27db7 100644
--- a/src/test/ui/nll/closure-requirements/propagate-fail-to-approximate-longer-wrong-bounds.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-fail-to-approximate-longer-wrong-bounds.stderr
@@ -11,7 +11,7 @@ LL | |     });
    |
    = note: defining type: DefId(0/1:18 ~ propagate_fail_to_approximate_longer_wrong_bounds[317d]::supply[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's, 't0, 't1, 't2, 't3> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#1r u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) &'_#2r u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't3)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>))
+               for<'r, 's, 't0, 't1, 't2, 't3> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) &'_#1r u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't0)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) &'_#2r u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't2)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) u32>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't3)) std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 't1)) u32>)),
            ]
    = note: late-bound region is '_#3r
    = note: late-bound region is '_#4r
diff --git a/src/test/ui/nll/closure-requirements/propagate-from-trait-match.stderr b/src/test/ui/nll/closure-requirements/propagate-from-trait-match.stderr
index c2bbd813814..282246f8166 100644
--- a/src/test/ui/nll/closure-requirements/propagate-from-trait-match.stderr
+++ b/src/test/ui/nll/closure-requirements/propagate-from-trait-match.stderr
@@ -15,7 +15,7 @@ LL | |     });
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((T,))
+               extern "rust-call" fn((T,)),
            ]
    = note: number of external vids: 2
    = note: where T: '_#1r
@@ -34,7 +34,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:6 ~ propagate_from_trait_match[317d]::supply[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 error[E0309]: the parameter type `T` may not live long enough
diff --git a/src/test/ui/nll/closure-requirements/return-wrong-bound-region.stderr b/src/test/ui/nll/closure-requirements/return-wrong-bound-region.stderr
index d5bfa3f9894..c5645413c77 100644
--- a/src/test/ui/nll/closure-requirements/return-wrong-bound-region.stderr
+++ b/src/test/ui/nll/closure-requirements/return-wrong-bound-region.stderr
@@ -6,7 +6,7 @@ LL |     expect_sig(|a, b| b); // ought to return `a`
    |
    = note: defining type: DefId(0/1:9 ~ return_wrong_bound_region[317d]::test[0]::{{closure}}[0]) with closure substs [
                i16,
-               for<'r, 's> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) i32, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) i32)) -> &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) i32
+               for<'r, 's> extern "rust-call" fn((&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) i32, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) i32)) -> &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) i32,
            ]
 
 error: lifetime may not live long enough
diff --git a/src/test/ui/nll/ty-outlives/projection-no-regions-closure.stderr b/src/test/ui/nll/ty-outlives/projection-no-regions-closure.stderr
index a7679aac219..cda1f7d3631 100644
--- a/src/test/ui/nll/ty-outlives/projection-no-regions-closure.stderr
+++ b/src/test/ui/nll/ty-outlives/projection-no-regions-closure.stderr
@@ -8,7 +8,7 @@ LL |     with_signature(x, |mut y| Box::new(y.next()))
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn Anything + '_#2r)>
+               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn Anything + '_#2r)>,
            ]
    = note: number of external vids: 3
    = note: where <T as std::iter::Iterator>::Item: '_#2r
@@ -27,7 +27,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:6 ~ projection_no_regions_closure[317d]::no_region[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 error[E0309]: the associated type `<T as std::iter::Iterator>::Item` may not live long enough
@@ -48,7 +48,7 @@ LL |     with_signature(x, |mut y| Box::new(y.next()))
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn Anything + '_#2r)>
+               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn Anything + '_#2r)>,
            ]
    = note: number of external vids: 3
    = note: where <T as std::iter::Iterator>::Item: '_#2r
@@ -66,7 +66,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:7 ~ projection_no_regions_closure[317d]::correct_region[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 note: External requirements
@@ -80,7 +80,7 @@ LL |     with_signature(x, |mut y| Box::new(y.next()))
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn Anything + '_#3r)>
+               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn Anything + '_#3r)>,
            ]
    = note: number of external vids: 4
    = note: where <T as std::iter::Iterator>::Item: '_#3r
@@ -100,7 +100,7 @@ LL | | }
    = note: defining type: DefId(0/0:8 ~ projection_no_regions_closure[317d]::wrong_region[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 error[E0309]: the associated type `<T as std::iter::Iterator>::Item` may not live long enough
@@ -122,7 +122,7 @@ LL |     with_signature(x, |mut y| Box::new(y.next()))
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn Anything + '_#3r)>
+               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn Anything + '_#3r)>,
            ]
    = note: number of external vids: 4
    = note: where <T as std::iter::Iterator>::Item: '_#3r
@@ -142,7 +142,7 @@ LL | | }
    = note: defining type: DefId(0/0:9 ~ projection_no_regions_closure[317d]::outlives_region[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 error: aborting due to 2 previous errors
diff --git a/src/test/ui/nll/ty-outlives/projection-one-region-closure.stderr b/src/test/ui/nll/ty-outlives/projection-one-region-closure.stderr
index 7ba7164b35b..9d716006500 100644
--- a/src/test/ui/nll/ty-outlives/projection-one-region-closure.stderr
+++ b/src/test/ui/nll/ty-outlives/projection-one-region-closure.stderr
@@ -8,7 +8,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)),
            ]
    = note: late-bound region is '_#3r
    = note: number of external vids: 4
@@ -29,7 +29,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:8 ~ projection_one_region_closure[317d]::no_relationships_late[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 error[E0309]: the parameter type `T` may not live long enough
@@ -62,7 +62,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
    = note: number of external vids: 4
    = note: where T: '_#3r
@@ -83,7 +83,7 @@ LL | | }
    = note: defining type: DefId(0/0:9 ~ projection_one_region_closure[317d]::no_relationships_early[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 error[E0309]: the parameter type `T` may not live long enough
@@ -116,7 +116,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
    = note: number of external vids: 4
    = note: where <T as Anything<ReClosureBound('_#2r)>>::AssocType: '_#3r
@@ -136,7 +136,7 @@ LL | | }
    = note: defining type: DefId(0/0:10 ~ projection_one_region_closure[317d]::projection_outlives[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 note: External requirements
@@ -150,7 +150,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
    = note: number of external vids: 4
    = note: where T: '_#3r
@@ -171,7 +171,7 @@ LL | | }
    = note: defining type: DefId(0/0:11 ~ projection_one_region_closure[317d]::elements_outlive[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 error: aborting due to 4 previous errors
diff --git a/src/test/ui/nll/ty-outlives/projection-one-region-trait-bound-closure.stderr b/src/test/ui/nll/ty-outlives/projection-one-region-trait-bound-closure.stderr
index 63ead49adfc..0fa4060137a 100644
--- a/src/test/ui/nll/ty-outlives/projection-one-region-trait-bound-closure.stderr
+++ b/src/test/ui/nll/ty-outlives/projection-one-region-trait-bound-closure.stderr
@@ -8,7 +8,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)),
            ]
    = note: late-bound region is '_#3r
    = note: number of external vids: 4
@@ -28,7 +28,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:8 ~ projection_one_region_trait_bound_closure[317d]::no_relationships_late[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 error: lifetime may not live long enough
@@ -53,7 +53,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
    = note: number of external vids: 4
    = note: where '_#2r: '_#3r
@@ -73,7 +73,7 @@ LL | | }
    = note: defining type: DefId(0/0:9 ~ projection_one_region_trait_bound_closure[317d]::no_relationships_early[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 error: lifetime may not live long enough
@@ -98,7 +98,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
    = note: number of external vids: 4
    = note: where <T as Anything<ReClosureBound('_#2r)>>::AssocType: '_#3r
@@ -118,7 +118,7 @@ LL | | }
    = note: defining type: DefId(0/0:10 ~ projection_one_region_trait_bound_closure[317d]::projection_outlives[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 note: External requirements
@@ -132,7 +132,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
    = note: number of external vids: 4
    = note: where '_#2r: '_#3r
@@ -152,7 +152,7 @@ LL | | }
    = note: defining type: DefId(0/0:11 ~ projection_one_region_trait_bound_closure[317d]::elements_outlive[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 note: External requirements
@@ -165,7 +165,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)),
            ]
    = note: number of external vids: 3
    = note: where '_#1r: '_#2r
@@ -184,7 +184,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:12 ~ projection_one_region_trait_bound_closure[317d]::one_region[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 error: aborting due to 2 previous errors
diff --git a/src/test/ui/nll/ty-outlives/projection-one-region-trait-bound-static-closure.stderr b/src/test/ui/nll/ty-outlives/projection-one-region-trait-bound-static-closure.stderr
index 61f8132cf49..f616a7feae3 100644
--- a/src/test/ui/nll/ty-outlives/projection-one-region-trait-bound-static-closure.stderr
+++ b/src/test/ui/nll/ty-outlives/projection-one-region-trait-bound-static-closure.stderr
@@ -8,7 +8,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)),
            ]
    = note: late-bound region is '_#3r
 
@@ -25,7 +25,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:8 ~ projection_one_region_trait_bound_static_closure[317d]::no_relationships_late[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 note: No external requirements
@@ -39,7 +39,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
 
 note: No external requirements
@@ -57,7 +57,7 @@ LL | | }
    = note: defining type: DefId(0/0:9 ~ projection_one_region_trait_bound_static_closure[317d]::no_relationships_early[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 note: No external requirements
@@ -71,7 +71,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
 
 note: No external requirements
@@ -89,7 +89,7 @@ LL | | }
    = note: defining type: DefId(0/0:10 ~ projection_one_region_trait_bound_static_closure[317d]::projection_outlives[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 note: No external requirements
@@ -103,7 +103,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
 
 note: No external requirements
@@ -121,7 +121,7 @@ LL | | }
    = note: defining type: DefId(0/0:11 ~ projection_one_region_trait_bound_static_closure[317d]::elements_outlive[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 note: No external requirements
@@ -134,7 +134,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)),
            ]
 
 note: No external requirements
@@ -151,6 +151,6 @@ LL | | }
    |
    = note: defining type: DefId(0/0:12 ~ projection_one_region_trait_bound_static_closure[317d]::one_region[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
diff --git a/src/test/ui/nll/ty-outlives/projection-two-region-trait-bound-closure.stderr b/src/test/ui/nll/ty-outlives/projection-two-region-trait-bound-closure.stderr
index f5daae28670..b761b031444 100644
--- a/src/test/ui/nll/ty-outlives/projection-two-region-trait-bound-closure.stderr
+++ b/src/test/ui/nll/ty-outlives/projection-two-region-trait-bound-closure.stderr
@@ -9,7 +9,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
    = note: late-bound region is '_#4r
    = note: number of external vids: 5
@@ -30,7 +30,7 @@ LL | | }
    = note: defining type: DefId(0/0:8 ~ projection_two_region_trait_bound_closure[317d]::no_relationships_late[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 error[E0309]: the associated type `<T as Anything<'_#5r, '_#6r>>::AssocType` may not live long enough
@@ -53,7 +53,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#3r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T)),
            ]
    = note: number of external vids: 5
    = note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#3r)>>::AssocType: '_#4r
@@ -74,7 +74,7 @@ LL | | }
                '_#1r,
                '_#2r,
                '_#3r,
-               T
+               T,
            ]
 
 error[E0309]: the associated type `<T as Anything<'_#6r, '_#7r>>::AssocType` may not live long enough
@@ -97,7 +97,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#3r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T)),
            ]
    = note: number of external vids: 5
    = note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#3r)>>::AssocType: '_#4r
@@ -118,7 +118,7 @@ LL | | }
                '_#1r,
                '_#2r,
                '_#3r,
-               T
+               T,
            ]
 
 note: External requirements
@@ -133,7 +133,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#3r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T)),
            ]
    = note: number of external vids: 5
    = note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#3r)>>::AssocType: '_#4r
@@ -154,7 +154,7 @@ LL | | }
                '_#1r,
                '_#2r,
                '_#3r,
-               T
+               T,
            ]
 
 note: External requirements
@@ -169,7 +169,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#3r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T)),
            ]
    = note: number of external vids: 5
    = note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#3r)>>::AssocType: '_#4r
@@ -190,7 +190,7 @@ LL | | }
                '_#1r,
                '_#2r,
                '_#3r,
-               T
+               T,
            ]
 
 note: External requirements
@@ -203,7 +203,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)),
            ]
    = note: late-bound region is '_#3r
    = note: number of external vids: 4
@@ -223,7 +223,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:13 ~ projection_two_region_trait_bound_closure[317d]::two_regions[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 error: lifetime may not live long enough
@@ -248,7 +248,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
    = note: number of external vids: 4
    = note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#2r)>>::AssocType: '_#3r
@@ -268,7 +268,7 @@ LL | | }
    = note: defining type: DefId(0/0:14 ~ projection_two_region_trait_bound_closure[317d]::two_regions_outlive[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 note: External requirements
@@ -281,7 +281,7 @@ LL |     with_signature(cell, t, |cell, t| require(cell, t));
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)),
            ]
    = note: number of external vids: 3
    = note: where <T as Anything<ReClosureBound('_#1r), ReClosureBound('_#1r)>>::AssocType: '_#2r
@@ -300,7 +300,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:15 ~ projection_two_region_trait_bound_closure[317d]::one_region[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 error: aborting due to 3 previous errors
diff --git a/src/test/ui/nll/ty-outlives/ty-param-closure-approximate-lower-bound.stderr b/src/test/ui/nll/ty-outlives/ty-param-closure-approximate-lower-bound.stderr
index 41c2916dca3..6f3071becfd 100644
--- a/src/test/ui/nll/ty-outlives/ty-param-closure-approximate-lower-bound.stderr
+++ b/src/test/ui/nll/ty-outlives/ty-param-closure-approximate-lower-bound.stderr
@@ -7,7 +7,7 @@ LL |     twice(cell, value, |a, b| invoke(a, b));
    = note: defining type: DefId(0/1:14 ~ ty_param_closure_approximate_lower_bound[317d]::generic[0]::{{closure}}[0]) with closure substs [
                T,
                i16,
-               for<'r, 's> extern "rust-call" fn((std::option::Option<std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) ()>>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) T))
+               for<'r, 's> extern "rust-call" fn((std::option::Option<std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) ()>>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) T)),
            ]
    = note: number of external vids: 2
    = note: where T: '_#1r
@@ -22,7 +22,7 @@ LL | | }
    | |_^
    |
    = note: defining type: DefId(0/0:5 ~ ty_param_closure_approximate_lower_bound[317d]::generic[0]) with substs [
-               T
+               T,
            ]
 
 note: External requirements
@@ -34,7 +34,7 @@ LL |     twice(cell, value, |a, b| invoke(a, b));
    = note: defining type: DefId(0/1:17 ~ ty_param_closure_approximate_lower_bound[317d]::generic_fail[0]::{{closure}}[0]) with closure substs [
                T,
                i16,
-               for<'r, 's> extern "rust-call" fn((std::option::Option<std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) ()>>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) T))
+               for<'r, 's> extern "rust-call" fn((std::option::Option<std::cell::Cell<&'_#1r &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) ()>>, &ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 's)) T)),
            ]
    = note: late-bound region is '_#2r
    = note: number of external vids: 3
@@ -50,7 +50,7 @@ LL | | }
    | |_^
    |
    = note: defining type: DefId(0/0:6 ~ ty_param_closure_approximate_lower_bound[317d]::generic_fail[0]) with substs [
-               T
+               T,
            ]
 
 error[E0309]: the parameter type `T` may not live long enough
diff --git a/src/test/ui/nll/ty-outlives/ty-param-closure-outlives-from-return-type.stderr b/src/test/ui/nll/ty-outlives/ty-param-closure-outlives-from-return-type.stderr
index 6a201b8523a..cdb71576203 100644
--- a/src/test/ui/nll/ty-outlives/ty-param-closure-outlives-from-return-type.stderr
+++ b/src/test/ui/nll/ty-outlives/ty-param-closure-outlives-from-return-type.stderr
@@ -8,7 +8,7 @@ LL |     with_signature(x, |y| y)
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn std::fmt::Debug + '_#2r)>
+               extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<(dyn std::fmt::Debug + '_#2r)>,
            ]
    = note: number of external vids: 3
    = note: where T: '_#2r
@@ -27,7 +27,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:5 ~ ty_param_closure_outlives_from_return_type[317d]::no_region[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 error[E0309]: the parameter type `T` may not live long enough
diff --git a/src/test/ui/nll/ty-outlives/ty-param-closure-outlives-from-where-clause.stderr b/src/test/ui/nll/ty-outlives/ty-param-closure-outlives-from-where-clause.stderr
index 4ddc54717fb..68798a335f9 100644
--- a/src/test/ui/nll/ty-outlives/ty-param-closure-outlives-from-where-clause.stderr
+++ b/src/test/ui/nll/ty-outlives/ty-param-closure-outlives-from-where-clause.stderr
@@ -14,7 +14,7 @@ LL | |     })
    = note: defining type: DefId(0/1:16 ~ ty_param_closure_outlives_from_where_clause[317d]::no_region[0]::{{closure}}[0]) with closure substs [
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#1r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#1r ()>, T)),
            ]
    = note: late-bound region is '_#2r
    = note: number of external vids: 3
@@ -33,7 +33,7 @@ LL | | }
    | |_^
    |
    = note: defining type: DefId(0/0:6 ~ ty_param_closure_outlives_from_where_clause[317d]::no_region[0]) with substs [
-               T
+               T,
            ]
 
 error[E0309]: the parameter type `T` may not live long enough
@@ -68,7 +68,7 @@ LL | |     })
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)),
            ]
    = note: number of external vids: 3
    = note: where T: '_#2r
@@ -87,7 +87,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:7 ~ ty_param_closure_outlives_from_where_clause[317d]::correct_region[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 note: External requirements
@@ -105,7 +105,7 @@ LL | |     })
                '_#1r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T)),
            ]
    = note: late-bound region is '_#3r
    = note: number of external vids: 4
@@ -125,7 +125,7 @@ LL | | }
    |
    = note: defining type: DefId(0/0:8 ~ ty_param_closure_outlives_from_where_clause[317d]::wrong_region[0]) with substs [
                '_#1r,
-               T
+               T,
            ]
 
 error[E0309]: the parameter type `T` may not live long enough
@@ -156,7 +156,7 @@ LL | |     })
                '_#2r,
                T,
                i32,
-               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
+               extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T)),
            ]
    = note: number of external vids: 4
    = note: where T: '_#3r
@@ -176,7 +176,7 @@ LL | | }
    = note: defining type: DefId(0/0:9 ~ ty_param_closure_outlives_from_where_clause[317d]::outlives_region[0]) with substs [
                '_#1r,
                '_#2r,
-               T
+               T,
            ]
 
 error: aborting due to 2 previous errors
diff --git a/src/test/ui/proc-macro/dollar-crate-issue-57089.stdout b/src/test/ui/proc-macro/dollar-crate-issue-57089.stdout
index 09340988c89..618380d7f0b 100644
--- a/src/test/ui/proc-macro/dollar-crate-issue-57089.stdout
+++ b/src/test/ui/proc-macro/dollar-crate-issue-57089.stdout
@@ -2,79 +2,79 @@ PROC MACRO INPUT (PRETTY-PRINTED): struct M ( $crate :: S ) ;
 PROC MACRO INPUT: TokenStream [
     Ident {
         ident: "struct",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Ident {
         ident: "M",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Group {
         delimiter: Parenthesis,
         stream: TokenStream [
             Ident {
                 ident: "$crate",
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Joint,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Alone,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Ident {
                 ident: "S",
-                span: #2 bytes(LO..HI)
-            }
+                span: #2 bytes(LO..HI),
+            },
         ],
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Punct {
         ch: ';',
         spacing: Alone,
-        span: #2 bytes(LO..HI)
-    }
+        span: #2 bytes(LO..HI),
+    },
 ]
 ATTRIBUTE INPUT (PRETTY-PRINTED): struct A(crate::S);
 ATTRIBUTE INPUT: TokenStream [
     Ident {
         ident: "struct",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Ident {
         ident: "A",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Group {
         delimiter: Parenthesis,
         stream: TokenStream [
             Ident {
                 ident: "$crate",
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Joint,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Alone,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Ident {
                 ident: "S",
-                span: #2 bytes(LO..HI)
-            }
+                span: #2 bytes(LO..HI),
+            },
         ],
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Punct {
         ch: ';',
         spacing: Alone,
-        span: #2 bytes(LO..HI)
-    }
+        span: #2 bytes(LO..HI),
+    },
 ]
diff --git a/src/test/ui/proc-macro/dollar-crate.stdout b/src/test/ui/proc-macro/dollar-crate.stdout
index c47b3603f41..454da539430 100644
--- a/src/test/ui/proc-macro/dollar-crate.stdout
+++ b/src/test/ui/proc-macro/dollar-crate.stdout
@@ -2,239 +2,239 @@ PROC MACRO INPUT (PRETTY-PRINTED): struct M ( $crate :: S ) ;
 PROC MACRO INPUT: TokenStream [
     Ident {
         ident: "struct",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Ident {
         ident: "M",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Group {
         delimiter: Parenthesis,
         stream: TokenStream [
             Ident {
                 ident: "$crate",
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Joint,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Alone,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Ident {
                 ident: "S",
-                span: #2 bytes(LO..HI)
-            }
+                span: #2 bytes(LO..HI),
+            },
         ],
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Punct {
         ch: ';',
         spacing: Alone,
-        span: #2 bytes(LO..HI)
-    }
+        span: #2 bytes(LO..HI),
+    },
 ]
 ATTRIBUTE INPUT (PRETTY-PRINTED): struct A(crate::S);
 ATTRIBUTE INPUT: TokenStream [
     Ident {
         ident: "struct",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Ident {
         ident: "A",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Group {
         delimiter: Parenthesis,
         stream: TokenStream [
             Ident {
                 ident: "$crate",
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Joint,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Alone,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Ident {
                 ident: "S",
-                span: #2 bytes(LO..HI)
-            }
+                span: #2 bytes(LO..HI),
+            },
         ],
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Punct {
         ch: ';',
         spacing: Alone,
-        span: #2 bytes(LO..HI)
-    }
+        span: #2 bytes(LO..HI),
+    },
 ]
 DERIVE INPUT (PRETTY-PRINTED): struct D(crate::S);
 DERIVE INPUT: TokenStream [
     Ident {
         ident: "struct",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Ident {
         ident: "D",
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Group {
         delimiter: Parenthesis,
         stream: TokenStream [
             Ident {
                 ident: "$crate",
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Joint,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Alone,
-                span: #2 bytes(LO..HI)
+                span: #2 bytes(LO..HI),
             },
             Ident {
                 ident: "S",
-                span: #2 bytes(LO..HI)
-            }
+                span: #2 bytes(LO..HI),
+            },
         ],
-        span: #2 bytes(LO..HI)
+        span: #2 bytes(LO..HI),
     },
     Punct {
         ch: ';',
         spacing: Alone,
-        span: #2 bytes(LO..HI)
-    }
+        span: #2 bytes(LO..HI),
+    },
 ]
 PROC MACRO INPUT (PRETTY-PRINTED): struct M ( $crate :: S ) ;
 PROC MACRO INPUT: TokenStream [
     Ident {
         ident: "struct",
-        span: #10 bytes(LO..HI)
+        span: #10 bytes(LO..HI),
     },
     Ident {
         ident: "M",
-        span: #10 bytes(LO..HI)
+        span: #10 bytes(LO..HI),
     },
     Group {
         delimiter: Parenthesis,
         stream: TokenStream [
             Ident {
                 ident: "$crate",
-                span: #10 bytes(LO..HI)
+                span: #10 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Joint,
-                span: #10 bytes(LO..HI)
+                span: #10 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Alone,
-                span: #10 bytes(LO..HI)
+                span: #10 bytes(LO..HI),
             },
             Ident {
                 ident: "S",
-                span: #10 bytes(LO..HI)
-            }
+                span: #10 bytes(LO..HI),
+            },
         ],
-        span: #10 bytes(LO..HI)
+        span: #10 bytes(LO..HI),
     },
     Punct {
         ch: ';',
         spacing: Alone,
-        span: #10 bytes(LO..HI)
-    }
+        span: #10 bytes(LO..HI),
+    },
 ]
 ATTRIBUTE INPUT (PRETTY-PRINTED): struct A(::dollar_crate_external::S);
 ATTRIBUTE INPUT: TokenStream [
     Ident {
         ident: "struct",
-        span: #10 bytes(LO..HI)
+        span: #10 bytes(LO..HI),
     },
     Ident {
         ident: "A",
-        span: #10 bytes(LO..HI)
+        span: #10 bytes(LO..HI),
     },
     Group {
         delimiter: Parenthesis,
         stream: TokenStream [
             Ident {
                 ident: "$crate",
-                span: #10 bytes(LO..HI)
+                span: #10 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Joint,
-                span: #10 bytes(LO..HI)
+                span: #10 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Alone,
-                span: #10 bytes(LO..HI)
+                span: #10 bytes(LO..HI),
             },
             Ident {
                 ident: "S",
-                span: #10 bytes(LO..HI)
-            }
+                span: #10 bytes(LO..HI),
+            },
         ],
-        span: #10 bytes(LO..HI)
+        span: #10 bytes(LO..HI),
     },
     Punct {
         ch: ';',
         spacing: Alone,
-        span: #10 bytes(LO..HI)
-    }
+        span: #10 bytes(LO..HI),
+    },
 ]
 DERIVE INPUT (PRETTY-PRINTED): struct D(::dollar_crate_external::S);
 DERIVE INPUT: TokenStream [
     Ident {
         ident: "struct",
-        span: #10 bytes(LO..HI)
+        span: #10 bytes(LO..HI),
     },
     Ident {
         ident: "D",
-        span: #10 bytes(LO..HI)
+        span: #10 bytes(LO..HI),
     },
     Group {
         delimiter: Parenthesis,
         stream: TokenStream [
             Ident {
                 ident: "$crate",
-                span: #10 bytes(LO..HI)
+                span: #10 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Joint,
-                span: #10 bytes(LO..HI)
+                span: #10 bytes(LO..HI),
             },
             Punct {
                 ch: ':',
                 spacing: Alone,
-                span: #10 bytes(LO..HI)
+                span: #10 bytes(LO..HI),
             },
             Ident {
                 ident: "S",
-                span: #10 bytes(LO..HI)
-            }
+                span: #10 bytes(LO..HI),
+            },
         ],
-        span: #10 bytes(LO..HI)
+        span: #10 bytes(LO..HI),
     },
     Punct {
         ch: ';',
         spacing: Alone,
-        span: #10 bytes(LO..HI)
-    }
+        span: #10 bytes(LO..HI),
+    },
 ]
diff --git a/src/test/ui/rfc-2361-dbg-macro/dbg-macro-expected-behavior.rs b/src/test/ui/rfc-2361-dbg-macro/dbg-macro-expected-behavior.rs
index 67f7f80a9e2..f1b73ee115d 100644
--- a/src/test/ui/rfc-2361-dbg-macro/dbg-macro-expected-behavior.rs
+++ b/src/test/ui/rfc-2361-dbg-macro/dbg-macro-expected-behavior.rs
@@ -64,22 +64,22 @@ fn validate_stderr(stderr: Vec<String>) {
 
         ":28] Point{x: 42, y: 24,} = Point {",
         "    x: 42,",
-        "    y: 24",
+        "    y: 24,",
         "}",
 
         ":29] b = Point {",
         "    x: 42,",
-        "    y: 24",
+        "    y: 24,",
         "}",
 
         ":37]",
 
         ":41] &a = NoCopy(",
-        "    1337",
+        "    1337,",
         ")",
 
         ":41] dbg!(& a) = NoCopy(",
-        "    1337",
+        "    1337,",
         ")",
         ":46] f(&42) = 42",