CLN: remove whitespace on blank line in test_tools.py

Author: AlexKirko

pandas/tests/indexes/datetimes/test_tools.py

@@ -2298,7 +2298,7 @@ def test_intarray_to_datetime():
     ser = pd.Series([1, 2, None, 2 ** 61, None])
     ser = ser.astype("Int64")
     ser_copy = ser.copy()
-    
+
     res = pd.to_datetime(ser, unit="ns")
 
     expected = pd.Series(