fixing lint error

Author: SnehaCRao

tests/test_categories.py

@@ -28,6 +28,7 @@ def test_get_survey_topics(self):
         self.assertEqual(len(responses.calls), 1)
         self.assertEqual(responses.calls[0].response.json(), survey_topics_json)
 
+
 class TestStudyMetadataEndpoint(unittest.TestCase):
     def setUp(self):
         self.api = DemandAPIClient(client_id='test', username='testuser', password='testpass', base_host=BASE_HOST)

tests/test_files/get_survey_topics.json

@@ -2,4 +2,4 @@
   "survey": {
     "topic": "milk"
   }
-}
+}