Fixed #5869 -- Corrected documentation for `now` template tag's "r" format...

Fixed #5869 -- Corrected documentation for `now` template tag's "r" format character.  Thanks, xavier.morel@masklinn.net.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@6640 bcc190cf-cafb-0310-a4f2-bffc1f526a37