Added a test from Jamie Gennis to ensure #9848 doesn't reappear.
Added a test from Jamie Gennis to ensure #9848 doesn't reappear.

The bug itself was fixed at some point in the past months (there have
been a few improvements to update() recently). Fixed #9848.

git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@10528 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django