Fixed #21268 -- Fixed E303 pep8 warnings

formtools/preview.py

@@ -101,7 +101,6 @@ class FormPreview(object):
         "Context for template rendering."
         return {'form': form, 'stage_field': self.unused_name('stage'), 'state': self.state}
 
-
     def parse_params(self, *args, **kwargs):
         """
         Given captured args and kwargs from the URLconf, saves something in

formtools/tests/tests.py

@@ -139,7 +139,6 @@ class PreviewTests(TestCase):
         response = self.client.post('/preview/', self.test_data)
         self.assertEqual(response.content, success_string_encoded)
 
-
     def test_form_submit_bad_hash(self):
         """
         Test contrib.formtools.preview form submittal does not proceed