Auto merge of #64972 - Centril:rollup-gcawast, r=Centril

Rollup of 7 pull requests

Successful merges:

 - #63416 (apfloat: improve doc comments)
 - #64820 (BTreeSet intersection, is_subset & difference optimizations)
 - #64910 (syntax: cleanup param, method, and misc parsing)
 - #64912 (Remove unneeded `fn main` blocks from docs)
 - #64933 (Fixes #64919. Suggest fix based on operator precendence.)
 - #64943 (Add lower bound doctests for `saturating_{add,sub}` signed ints)
 - #64950 (Simplify interners)

Failed merges:

r? @ghost

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libsyntax/parse/diagnostics.rs b/src/libsyntax/parse/diagnostics.rs
index ec5d00e0952..e8d7b7663ed 100644
--- a/src/libsyntax/parse/diagnostics.rs
+++ b/src/libsyntax/parse/diagnostics.rs
@@ -1180,7 +1180,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    crate fn expected_semi_or_open_brace(&mut self) -> PResult<'a, ast::TraitItem> {
+    crate fn expected_semi_or_open_brace<T>(&mut self) -> PResult<'a, T> {
         let token_str = self.this_token_descr();
         let mut err = self.fatal(&format!("expected `;` or `{{`, found {}", token_str));
         err.span_label(self.token.span, "expected `;` or `{`");