fixed lint error

Author: anmyachev

pandas/tests/groupby/test_grouping.py

@@ -666,7 +666,7 @@ def test_gb_key_len_equal_axis_len(self):
         df = pd.DataFrame([['foo', 'bar', 'B', 1],
                            ['foo', 'bar', 'B', 2],
                            ['foo', 'baz', 'C', 3]],
-                           columns=['first', 'second', 'third', 'one'])
+                          columns=['first', 'second', 'third', 'one'])
         df = df.set_index(['first', 'second'])
         df = df.groupby(['first', 'second', 'third']).size()
         assert df.loc[('foo', 'bar', 'B')] == 2