DEPR: deprecate get_ftype_counts (GH18243)

PEP8 style fix

Author: GGordonGordon

pandas/tests/series/test_dtypes.py

@@ -64,7 +64,7 @@ def test_dtype(self):
         assert self.ts.ftypes == 'float64:dense'
         tm.assert_series_equal(self.ts.get_dtype_counts(),
                                Series(1, ['float64']))
-        #GH18243 - Assert .get_ftype_counts is deprecated
+        # GH18243 - Assert .get_ftype_counts is deprecated
         with tm.assert_produces_warning(FutureWarning):
             tm.assert_series_equal(self.ts.get_ftype_counts(),
                                    Series(1, ['float64:dense']))