LINT fix

Author: WillAyd

pandas/tests/generic/test_generic.py

@@ -619,6 +619,7 @@ def test_pct_change(self, periods, fill_method, limit, exp):
             res.name = None
         tm.assert_series_equal(res, pd.Series(exp))
 
+
 class TestNDFrame(object):
     # tests that don't fit elsewhere