added doc strings

Author: topper-123

pandas/core/indexes/datetimes.py

@@ -464,6 +464,7 @@ def _convert_for_op(self, value):
             return _to_M8(value)
         raise ValueError("Passed item and index have different timezone")
 
+    @Appender(Index.difference.__doc__)
     def difference(self, other, sort=None):
         new_idx = super().difference(other, sort=sort)
         new_idx.freq = None

pandas/core/indexes/timedeltas.py

@@ -406,6 +406,7 @@ def intersection(self, other, sort=False):
         """
         return super().intersection(other, sort=sort)
 
+    @Appender(Index.difference.__doc__)
     def difference(self, other, sort=None):
         new_idx = super().difference(other, sort=sort)
         new_idx.freq = None