[1.2.X] Fixed #9033 - Add bullets to QuerySet extra() arguments. thanks julien...

[1.2.X] Fixed #9033 - Add bullets to QuerySet extra() arguments. thanks julien for the suggestion and dwillis for the patch.

Backport of r14816 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14817 bcc190cf-cafb-0310-a4f2-bffc1f526a37