Fixed #7876 - Improved template error message to include expected end tag....

Fixed #7876 - Improved template error message to include expected end tag. Thanks to Matthias Kestenholz for the initial patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12460 bcc190cf-cafb-0310-a4f2-bffc1f526a37