Fixed #15557 -- removed an extra backtick from the `topics/http/shortcuts`....

Fixed #15557 -- removed an extra backtick from the `topics/http/shortcuts`. Thanks to johnthedebs for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15757 bcc190cf-cafb-0310-a4f2-bffc1f526a37