Fixed #12940 -- Modified some admin actions in contrib.comments to use...

Fixed #12940 -- Modified some admin actions in contrib.comments to use ungettext in order to support Russian (and similar) pluralization rules. Thanks to void for the report and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12770 bcc190cf-cafb-0310-a4f2-bffc1f526a37