Standardize on tt name for tokens
diff --git a/src/gen/fold.rs b/src/gen/fold.rs
index 1ce2f31..11e071f 100644
--- a/src/gen/fold.rs
+++ b/src/gen/fold.rs
@@ -1946,7 +1946,7 @@
     Macro {
         path: _visitor.fold_path(_i . path),
         bang_token: Token ! [ ! ](tokens_helper(_visitor, &(_i . bang_token).0)),
-        tokens: _i . tokens,
+        tt: _i . tt,
     }
 }