Fixed #11461: Ensured complete traceback is available on the debug page when...

Fixed #11461: Ensured complete traceback is available on the debug page when an exception is encountered during template rendering, even when running on Python 2.6 or higher. Thanks Glenn.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@12725 bcc190cf-cafb-0310-a4f2-bffc1f526a37