typo fix

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@40356 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/RelationField.py

@@ -124,7 +124,7 @@ class RelationStringFieldValidator(
     """
     relation_item_id = field.generate_subfield_key(ITEM_ID,
                                                    key=key)
-     if isinstance(relation_uid_list, (list, tuple)):
+     if isinstance(relation_uid_list, (list, tuple):
       try:
         relation_uid_list = relation_uid_list[0]
       except IndexError: