[1.5.x] Fixed autopk issue in tests

        colour = Colour.objects.create(name='Blue')

        form = ColourfulItemForm()

        self.maxDiff = 1024

        self.assertHTMLEqual(form.as_p(), """<p><label for="id_name">Name:</label> <input id="id_name" type="text" name="name" maxlength="50" /></p>

        self.assertHTMLEqual(

            form.as_p(),

            """<p><label for="id_name">Name:</label> <input id="id_name" type="text" name="name" maxlength="50" /></p>

        <p><label for="id_colours">Colours:</label> <select multiple="multiple" name="colours" id="id_colours">

        <option value="1">Blue</option>

        </select> <span class="helptext"> Hold down "Control", or "Command" on a Mac, to select more than one.</span></p>""")

        <option value="%(blue_pk)s">Blue</option>

        </select> <span class="helptext"> Hold down "Control", or "Command" on a Mac, to select more than one.</span></p>"""

            % {'blue_pk': colour.pk})