Fix three more (reverse) “a”/“an” typos

crates/ide/src/inlay_hints.rs

@@ -331,7 +331,7 @@ fn should_hide_param_name_hint(
     // - exact argument<->parameter match(ignoring leading underscore) or parameter is a prefix/suffix
     //   of argument with _ splitting it off
     // - param starts with `ra_fixture`
-    // - param is a well known name in an unary function
+    // - param is a well known name in a unary function
 
     let param_name = param_name.trim_start_matches('_');
     if param_name.is_empty() {
@@ -369,7 +369,7 @@ fn is_argument_similar_to_param_name(argument: &ast::Expr, param_name: &str) ->
     argument == param_name
 }
 
-/// Hide the parameter name of an unary function if it is a `_` - prefixed suffix of the function's name, or equal.
+/// Hide the parameter name of a unary function if it is a `_` - prefixed suffix of the function's name, or equal.
 ///
 /// `fn strip_suffix(suffix)` will be hidden.
 /// `fn stripsuffix(suffix)` will not be hidden.

crates/parser/src/parser.rs

@@ -182,7 +182,7 @@ impl<'t> Parser<'t> {
 
     /// Advances the parser by one token, remapping its kind.
     /// This is useful to create contextual keywords from
-    /// identifiers. For example, the lexer creates an `union`
+    /// identifiers. For example, the lexer creates a `union`
     /// *identifier* token, but the parser remaps it to the
     /// `union` keyword, and keyword is what ends up in the
     /// final tree.