          self.assertEqual(instance.height, 16)
  
          # Editing the instance without re-uploading the image should not affect the image or its width/height properties
          f = OptionalImageFileForm(
                  data={'description': 'New Description'},
                  instance=instance)
          self.assertEqual(f.is_valid(), True)
          instance = f.save()
          self.assertEqual(instance.description, 'New Description')
          self.assertEqual(instance.image.name, 'tests/test3.png')
          self.assertEqual(instance.width, 16)
 
</s> remove                 data={'description': 'New Description'},
                instance=instance)
 </s> add             data={'description': 'New Description'},
            instance=instance) </s> remove                 data={'description': 'And a final one'},
                files={'image': SimpleUploadedFile('test3.png', image_data)}, instance=instance)
 </s> add             data={'description': 'And a final one'},
            files={'image': SimpleUploadedFile('test3.png', image_data)}, instance=instance) </s> remove                 data={'description': 'Changed it'},
                files={'image': SimpleUploadedFile('test2.png', image_data2)}, instance=instance)
 </s> add             data={'description': 'Changed it'},
            files={'image': SimpleUploadedFile('test2.png', image_data2)}, instance=instance) </s> remove                 data={'description': 'An image'},
                files={'image': SimpleUploadedFile('test.png', image_data)})
 </s> add             data={'description': 'An image'},
            files={'image': SimpleUploadedFile('test.png', image_data)}) </s> remove                 data={'description': 'Assistance'},
                files={'file': SimpleUploadedFile('test3.txt', b'hello world')}, instance=instance)
 </s> add             data={'description': 'Assistance'},
            files={'file': SimpleUploadedFile('test3.txt', b'hello world')}, instance=instance)
            data={'description': 'New Description'},
            instance=instance)
          self.assertEqual(instance.height, 16)
  
          # Editing the instance without re-uploading the image should not affect the image or its width/height properties
          f = OptionalImageFileForm(
            data={'description': 'New Description'},
            instance=instance)
            data={'description': 'New Description'},
            instance=instance)
          self.assertEqual(f.is_valid(), True)
          instance = f.save()
          self.assertEqual(instance.description, 'New Description')
          self.assertEqual(instance.image.name, 'tests/test3.png')
          self.assertEqual(instance.width, 16)
keep keep keep keep replace replace keep keep keep keep keep
 Fixed #21288 -- Fixed E126 pep8 warnings 
tests/model_forms/tests.py