[1.4.x] Fixed #19902 -- backport of as_view docs

        one user visiting your view could have an effect on subsequent users

        visiting the same view.

    .. classmethod:: as_view(**initkwargs)

        Returns a callable view that takes a request and returns a response::

            response = MyView.as_view()(request)

    .. method:: dispatch(request, *args, **kwargs)

        The ``view`` part of the view -- the method that accepts a ``request``