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-rw-r--r--sqlparse/engine/grouping.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/sqlparse/engine/grouping.py b/sqlparse/engine/grouping.py
index 8236c49..15dc5de 100644
--- a/sqlparse/engine/grouping.py
+++ b/sqlparse/engine/grouping.py
@@ -117,7 +117,7 @@ def group_as(tlist):
return not token.ttype in (T.DML, T.DDL)
def _left_valid(token):
- if token.ttype is T.Keyword and token.value in ('NULL'):
+ if token.ttype is T.Keyword and token.value in ('NULL',):
return True
return token.ttype is not T.Keyword