[1.2.X] Fixed #13759 - Multi-db docs have an example that isn't syntax highlighting

  
Thanks to Tim Hatch for report and patch.

Backport of [13664] from trunk


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13665 bcc190cf-cafb-0310-a4f2-bffc1f526a37