Fixed #8909 -- Fixed typo in contenttypes docs. Thanks, arien

If you don't add the reverse relationship, you can do the lookup manually::

    >>> b = Bookmark.objects.get(url='http://www.djangoproject.com/)

    >>> b = Bookmark.objects.get(url='http://www.djangoproject.com/')

    >>> bookmark_type = ContentType.objects.get_for_model(b)

    >>> TaggedItem.objects.filter(content_type__pk=bookmark_type.id,

    ...                           object_id=b.id)