add back removed whitespace

Author: rforgione

pandas/tests/test_common.py

@@ -197,6 +197,7 @@ def test_dict_compat():
     assert (com._dict_compat(expected) == expected)
     assert (com._dict_compat(data_unchanged) == data_unchanged)
 
+
 if __name__ == '__main__':
     nose.runmodule(argv=[__file__, '-vvs', '-x', '--pdb', '--pdb-failure'],
                    exit=False)