[1.2.X] Fixed #13754 - Add a note about a test client session property gotcha

    A dictionary-like object containing session information. See the

    :doc:`session documentation</topics/http/sessions>` for full details.

    To modify the session and then save it, it must be stored in a variable

    first (because a new ``SessionStore`` is created every time this property

    is accessed)::

        def test_something(self):

            session = self.client.session

            session['somekey'] = 'test'

            session.save()

.. _Cookie module documentation: http://docs.python.org/library/cookie.html

Example