Fixed typo in docs/topics/http/sessions.txt

    .. method:: flush()

      Delete the current session data from the session and delete the session

      Deletes the current session data from the session and deletes the session

      cookie. This is used if you want to ensure that the previous session data

      can't be accessed again from the user's browser (for example, the

      :func:`django.contrib.auth.logout()` function calls it).