[1.3.X] Fixed #15664 - Removed extra parens in commit_on_success example.
[1.3.X] Fixed #15664 - Removed extra parens in commit_on_success example.

Backport of r15923 from trunk.

git-svn-id: 6bee183d120e8e569924b918ee6c564bbb314a32@15924 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django-nonrel/django-nonrel,django-nonrel/django-nonrel,django-nonrel/django-nonrel