Auto merge of #106215 - matthiaskrgr:rollup-53r89ww, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #106028 (docs/test: add UI test and long-form error docs for `E0461`)
 - #106172 (Suggest `impl Iterator` when possible for `_` return type)
 - #106173 (Deduplicate `op` methods)
 - #106176 (Recover `fn` keyword as `Fn` trait in bounds)
 - #106194 (rustdoc: combine common sidebar background color CSS rules)
 - #106199 (Silence knock-down errors on `[type error]` bindings)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 8 insertions, 0 deletions

diff --git a/compiler/rustc_parse/src/errors.rs b/compiler/rustc_parse/src/errors.rs
index 18a0bee9c2e..574591529f3 100644
--- a/compiler/rustc_parse/src/errors.rs
+++ b/compiler/rustc_parse/src/errors.rs
@@ -1229,3 +1229,11 @@ pub(crate) struct FnTypoWithImpl {
     #[suggestion(applicability = "maybe-incorrect", code = "impl", style = "verbose")]
     pub fn_span: Span,
 }
+
+#[derive(Diagnostic)]
+#[diag(parse_expected_fn_path_found_fn_keyword)]
+pub(crate) struct ExpectedFnPathFoundFnKeyword {
+    #[primary_span]
+    #[suggestion(applicability = "machine-applicable", code = "Fn", style = "verbose")]
+    pub fn_token_span: Span,
+}