Fixed #14629 -- corrected a misspelling and poor wording in the docs. Thanks...

Fixed #14629 -- corrected a misspelling and poor wording in the docs.  Thanks to OldTroll for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14466 bcc190cf-cafb-0310-a4f2-bffc1f526a37