Rollup merge of #126052 - nnethercote:rustc_parse-more-cleanups, r=spastorino

More `rustc_parse` cleanups

Following on from #125815.

r? `@spastorino`

compiler/rustc_parse/src/parser/expr.rs

@@ -431,7 +431,7 @@ impl<'a> Parser<'a> {
     /// The method does not advance the current token.
     ///
     /// Also performs recovery for `and` / `or` which are mistaken for `&&` and `||` respectively.
-    pub fn check_assoc_op(&self) -> Option<Spanned<AssocOp>> {
+    pub(super) fn check_assoc_op(&self) -> Option<Spanned<AssocOp>> {
         let (op, span) = match (AssocOp::from_token(&self.token), self.token.ident()) {
             // When parsing const expressions, stop parsing when encountering `>`.
             (
@@ -1006,7 +1006,11 @@ impl<'a> Parser<'a> {
         }
     }
 
-    pub fn parse_dot_suffix_expr(&mut self, lo: Span, base: P<Expr>) -> PResult<'a, P<Expr>> {
+    pub(super) fn parse_dot_suffix_expr(
+        &mut self,
+        lo: Span,
+        base: P<Expr>,
+    ) -> PResult<'a, P<Expr>> {
         // At this point we've consumed something like `expr.` and `self.token` holds the token
         // after the dot.
         match self.token.uninterpolate().kind {