This avoids failure to_datetime when value passed is None. This fix is for pandas versions > 0.24

closes pandas-dev#30011

Author: maheshreddybapatu

pandas/tests/indexes/datetimes/test_tools.py

@@ -110,11 +110,12 @@ def test_to_datetime_format_YYYYMMDD(self, cache):
             Series([19801222, None, 20010112])
         ],
     )
-    def test_to_datetime_format_YYYYMMDD_with_none(self,input_s):
+    def test_to_datetime_format_YYYYMMDD_with_none(self, input_s):
         # GH 30011
         # format='%Y%m%d'
         # with None
-        expected = Series([Timestamp("19801222"), Timestamp(None), Timestamp("20010112")])
+        expected = Series([Timestamp("19801222"), Timestamp(None), 
+                           Timestamp("20010112")])
         result = pd.to_datetime(input_s, format="%Y%m%d")
         tm.assert_series_equal(result, expected)