no whitespace/comment required between rules

src/main/jastadd/parser/RelAst.parser

 GrammarFile goal
   = comment_list.c grammar_file.f {: f.getDeclarationList().insertChild(new EmptyDeclaration(c), 0); return f; :}
-  | grammar_file
 ;
 
 GrammarFile grammar_file
@@ -16,8 +15,8 @@ Declaration declaration
 // this method would be create by the JAstAddParser from a usage of
 // 'comment+' in a rule, but only for the standard list class 'List'.
 JastAddList comment_list
-  = comment.n {: return new JastAddList().add(n); :}
-  | comment_list.l comment.n {: return l.add(n); :}
+  = comment.c comment_list.l {: l.insertChild(c, 0); return l; :}
+  | /* epsilon */            {: return new JastAddList(); :}
 ;
 
 Comment comment