Refactor away ast::Attribute_.

src/libsyntax/parse/parser.rs

@@ -3751,9 +3751,7 @@ impl<'a> Parser<'a> {
     /// Emit an expected item after attributes error.
     fn expected_item_err(&self, attrs: &[Attribute]) {
         let message = match attrs.last() {
-            Some(&Attribute { node: ast::Attribute_ { is_sugared_doc: true, .. }, .. }) => {
-                "expected item after doc comment"
-            }
+            Some(&Attribute { is_sugared_doc: true, .. }) => "expected item after doc comment",
             _ => "expected item after attributes",
         };