Revert the visibility removal of macro_rules visibility (#46)

ChayimFriedman2 · web-flow · commit 11206f1fb048 · 2022-02-24T14:20:36.000+02:00
As discussed in rust-analyzer/ungrammar#46 (comment).
diff --git a/rust.ungram b/rust.ungram
@@ -102,7 +102,7 @@ Item =
 | Use
 
 MacroRules =
-  Attr*
+  Attr* Visibility?
   'macro_rules' '!' Name
   TokenTree
 
