Grammar check: update rustc for forced keywords

Author: DanielEScherzer

tools/grammar-check/src/tools/rustc.rs

@@ -223,6 +223,7 @@ fn to_reference_name(kind: &TokenKind) -> String {
             rustc_ast::token::LitKind::Err(_) => "Literal Error",
         },
         TokenKind::Ident(_, IdentKind::Normal) => "IDENTIFIER_OR_KEYWORD",
+        TokenKind::Ident(_, IdentKind::ForcedKeyword) => "IDENTIFIER_OR_KEYWORD",
         TokenKind::Ident(_, IdentKind::Raw) => "RAW_IDENTIFIER",
         TokenKind::NtIdent(..) => panic!("unexpected NtIdent"),
         TokenKind::Lifetime(..) => "LIFETIME_TOKEN",