                  ('0', _('No'))):
              yield {
                  'selected': self.lookup_val == lookup and not self.lookup_val2,
                  'query_string': cl.get_query_string({
                          self.lookup_kwarg: lookup,
                  }, [self.lookup_kwarg2]),
                  'display': title,
              }
          if isinstance(self.field, models.NullBooleanField):
              yield {
 
</s> remove                                     self.lookup_kwarg: lookup}),
 </s> add                     self.lookup_kwarg: lookup}), </s> remove                         self.lookup_kwarg2: 'True',
 </s> add                     self.lookup_kwarg2: 'True', </s> remove                                     param_dict, [self.field_generic]),
 </s> add                     param_dict, [self.field_generic]), </s> remove                         form[cl.model._meta.pk.name].is_hidden)):
 </s> add                     form[cl.model._meta.pk.name].is_hidden)): </s> remove         self.message_user(request, _(
            'The %(name)s "%(obj)s" was deleted successfully.') % {
 </s> add         self.message_user(request,
            _('The %(name)s "%(obj)s" was deleted successfully.') % {
                    self.lookup_kwarg: lookup,
                  ('0', _('No'))):
              yield {
                  'selected': self.lookup_val == lookup and not self.lookup_val2,
                  'query_string': cl.get_query_string({
                    self.lookup_kwarg: lookup,
                  }, [self.lookup_kwarg2]),
                  'display': title,
              }
          if isinstance(self.field, models.NullBooleanField):
              yield {
keep keep keep keep replace keep keep keep keep keep
 Fixed #21288 -- Fixed E126 pep8 warnings 
django/contrib/admin/filters.py