Strip comments from a token list before sublists

Avoid stripping T.Comment tokens contained within an sql.Comment before
stripping the sql.Comment itself.  Now an sql.Comment token will be
stripped first along with any contained T.Comment tokens.

Author: living180

sqlparse/filters/others.py

@@ -51,8 +51,8 @@ def _get_insert_token(token):
             tidx, token = get_next_comment()
 
     def process(self, stmt):
-        [self.process(sgroup) for sgroup in stmt.get_sublists()]
         StripCommentsFilter._process(stmt)
+        [self.process(sgroup) for sgroup in stmt.get_sublists()]
         return stmt