Fix linting error

Author: willbeaufoy

tests/test_testing.py

@@ -115,7 +115,7 @@ def test_force_authenticate_with_user_and_token(self):
         """
         user = User.objects.create_user('example', '[email protected]')
         token = Token.objects.create(key='xyz', user=user)
-        
+
         self.client.force_authenticate(user=user, token=token)
         response = self.client.get('/view/')