Fixed #9913 - Clarified User.is_authenticated docs.

    .. method:: is_authenticated()

        Always returns ``True``. This is a way to tell if the user has been

        authenticated. This does not imply any permissions, and doesn't check

        if the user is active - it only indicates that the user has provided a

        valid username and password.

        Always returns ``True`` (as opposed to

        ``AnonymousUser.is_authenticated()`` which always returns ``False``).

        This is a way to tell if the user has been authenticated. This does not

        imply any permissions, and doesn't check if the user is active - it

        only indicates that ``request.user`` has been populated by the

        :class:`~django.contrib.auth.middleware.AuthenticationMiddleware` with

        a :class:`~django.contrib.auth.models.User` object representing the

        currently logged-in user.

    .. method:: get_full_name()