ENH: 3715 - fix whitespace

Author: nchmura4

pandas/tseries/tests/test_resample.py

@@ -373,7 +373,7 @@ def test_fill_value(self):
         df_up = df.resample('1S').asfreq()
 
         expected_ts = ts_up.fillna(2).resample('2S').sum()
-        actual_ts = ts_up.resample('2S',fill_value=2).sum()
+        actual_ts = ts_up.resample('2S', fill_value=2).sum()
         assert_series_equal(expected_ts, actual_ts)
 
         expected_df = df_up.fillna(1.5).resample('2S').sum()