Rollup merge of #77204 - LingMan:patch-3, r=jonas-schievink

Remove stray word from `ClosureKind::extends` docs

compiler/rustc_middle/src/ty/mod.rs

@@ -2675,7 +2675,7 @@ impl<'tcx> ClosureKind {
  }
  }
 
- /// Returns `true` if this a type that impls this closure kind
+ /// Returns `true` if a type that impls this closure kind
  /// must also implement `other`.
  pub fn extends(self, other: ty::ClosureKind) -> bool {
  match (self, other) {