  
          if obj is None:
              raise Http404(
                  _('%(name)s object with primary key %(key)r does not exist.') %
                      {'name': force_text(opts.verbose_name), 'key': escape(object_id)}
              )
  
          using = router.db_for_write(self.model)
  
          # Populate deleted_objects, a data structure of all related objects that
 
</s> remove             return self.add_view(request, form_url=reverse('admin:%s_%s_add' %
                                    (opts.app_label, opts.model_name),
                                    current_app=self.admin_site.name))
 </s> add             return self.add_view(request, form_url=reverse('admin:%s_%s_add' % (
                opts.app_label, opts.model_name),
                current_app=self.admin_site.name)) </s> remove                 "<Article: Article 1>",
                "<Article: Article 2>",
 </s> add             "<Article: Article 1>",
            "<Article: Article 2>", </s> remove                     UserModel.USERNAME_FIELD: username
 </s> add                 UserModel.USERNAME_FIELD: username </s> remove                 b'--boundary',
                b'Content-ID: id; name="name"',
                b'',
                b'value',
                b'--boundary--'
                b''])
 </s> add             b'--boundary',
            b'Content-ID: id; name="name"',
            b'',
            b'value',
            b'--boundary--'
            b'']) </s> remove                 Source.objects.all(),
                ["<Source: Source object>"]
 </s> add             Source.objects.all(),
            ["<Source: Source object>"]
                {'name': force_text(opts.verbose_name), 'key': escape(object_id)}
  
          if obj is None:
              raise Http404(
                  _('%(name)s object with primary key %(key)r does not exist.') %
                {'name': force_text(opts.verbose_name), 'key': escape(object_id)}
              )
  
          using = router.db_for_write(self.model)
  
          # Populate deleted_objects, a data structure of all related objects that
keep keep keep keep replace keep keep keep keep keep
 Fixed #21288 -- Fixed E126 pep8 warnings 
django/contrib/admin/options.py