[1.2.X] Fixed #14790 - Fix reST in 1.0 porting guide - thanks adamv.

  ``sender=None``

* Make any custom signals you've declared into instances of

  :class:`django.dispatch.Signal`` instead of anonymous objects.

  :class:`django.dispatch.Signal` instead of anonymous objects.

Here's quick summary of the code changes you'll need to make:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

``django.http.HttpResponse.headers`` has been renamed to ``_headers`` and

:class:`HttpResponse`` now supports containment checking directly. So use

``if header in response:`` instead of ``if header in response.headers:``.

:class:`~django.http.HttpResponse` now supports containment checking directly.

So use ``if header in response:`` instead of ``if header in response.headers:``.

Generic relations

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Running management commands from your code

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

:mod:`django.core.management`` has been greatly refactored.

:mod:`django.core.management` has been greatly refactored.

Calls to management services in your code now need to use

``call_command``. For example, if you have some test code that calls flush and