Fixed #15509 -- corrected a typo in the cache docs.  Thanks Paul.
Fixed #15509 -- corrected a typo in the cache docs.  Thanks Paul.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%4015654

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