Updated whatsnew

Author: Dr-Irv

doc/source/whatsnew/v0.23.0.txt

@@ -837,8 +837,8 @@ Indexing
 - Bug in :func:`IntervalIndex.symmetric_difference` where the symmetric difference with a non-``IntervalIndex`` did not raise (:issue:`18475`)
 - Bug in :class:`IntervalIndex` where set operations that returned an empty ``IntervalIndex`` had the wrong dtype (:issue:`19101`)
 - Bug in :meth:`DataFrame.drop_duplicates` where no ``KeyError`` is raised when passing in columns that don't exist on the ``DataFrame`` (issue:`19726`)
-- Bug in :func:`Index.union` and :func:`Index.intersection` where name of the `Index` of the result was not computed correctly for certain cases (:issue:`9943`, :issue:`9862`)
-- Bug in :func:`Index.difference` when taking difference of set and itself as type was not preserved.
+- Bug in :func:`Index.union` and :func:`Index.intersection` where name of the ``Index`` of the result was not computed correctly for certain cases (:issue:`9943`, :issue:`9862`)
+- Bug in :func:`Index.difference` when taking difference of ``Index`` and itself as type was not preserved. (:issue:`19849`)
 
 
 MultiIndex