Fixed #15597: When formatting the debug page for inclusion in an e-mail,...

Fixed #15597: When formatting the debug page for inclusion in an e-mail, suppress the note about "seeing this" because DEBUG is True.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@15802 bcc190cf-cafb-0310-a4f2-bffc1f526a37