Rollup merge of #132332 - nnethercote:use-token_descr-more, r=estebank

Use `token_descr` more in error messages

This is the first two commits from #124141, put into their own PR to get things rolling. Commit messages have the details.

r? ``@estebank``
cc ``@petrochenkov``

compiler/rustc_parse/src/parser/mod.rs

@@ -424,7 +424,7 @@ impl TokenDescription {
     }
 }
 
-pub(super) fn token_descr(token: &Token) -> String {
+pub fn token_descr(token: &Token) -> String {
     let name = pprust::token_to_string(token).to_string();
 
     let kind = match (TokenDescription::from_token(token), &token.kind) {