DOC: Fix SS06 errors in pandas.DatetimeIndex

Author: Hori75

pandas/core/indexes/datetimes.py

@@ -78,9 +78,10 @@ def _new_DatetimeIndex(cls, d):
 )
 class DatetimeIndex(DatetimeTimedeltaMixin):
     """
-    Immutable ndarray of datetime64 data, represented internally as int64, and
-    which can be boxed to Timestamp objects that are subclasses of datetime and
-    carry metadata such as frequency information.
+    Immutable ndarray of datetime64 data.
+
+    Represented internally as int64, and which can be boxed to Timestamp objects
+    that are subclasses of datetime and carry metadata such as frequency information.
 
     Parameters
     ----------