message: clarify ident_str
diff: @@ -62,7 +62,8 @@ macro_rules! count_items {
  ($($item:expr),*) => {<[()]>::len(&[$($crate::replace_expr!($item ())),*])};
  }
  -/// Hack to convert an identifier to a string, including raw identifiers.
  +/// Hack to convert an identifier to a string, including raw identifiers like
  +/// `r#type`.
  #[doc(hidden)]
  #[macro_export]
  macro_rules! ident_str {
  