chore: remove duplicate words

Author: hattizai

clippy_lints/src/empty_with_brackets.rs

@@ -16,7 +16,7 @@ declare_clippy_lint! {
     /// and it may be desirable to do so consistently for style.
     ///
     /// However, removing the brackets also introduces a public constant named after the struct,
-    /// so this is not just a syntactic simplification but an an API change, and adding them back
+    /// so this is not just a syntactic simplification but an API change, and adding them back
     /// is a *breaking* API change.
     ///
     /// ### Example
@@ -44,7 +44,7 @@ declare_clippy_lint! {
     /// and it may be desirable to do so consistently for style.
     ///
     /// However, removing the brackets also introduces a public constant named after the variant,
-    /// so this is not just a syntactic simplification but an an API change, and adding them back
+    /// so this is not just a syntactic simplification but an API change, and adding them back
     /// is a *breaking* API change.
     ///
     /// ### Example

clippy_lints/src/non_copy_const.rs

@@ -258,7 +258,7 @@ impl<'tcx> NonCopyConst<'tcx> {
                 // e.g. implementing `has_frozen_variant` described above, and not running this function
                 // when the type doesn't have any frozen variants would be the 'correct' way for the 2nd
                 // case (that actually removes another suboptimal behavior (I won't say 'false positive') where,
-                // similar to 2., but with the a frozen variant) (e.g. borrowing
+                // similar to 2., but with a frozen variant) (e.g. borrowing
                 // `borrow_interior_mutable_const::enums::AssocConsts::TO_BE_FROZEN_VARIANT`).
                 // I chose this way because unfrozen enums as assoc consts are rare (or, hopefully, none).
                 matches!(err, ErrorHandled::TooGeneric(..))