fixing remarks for whatsnew

Author: realead

doc/source/whatsnew/v0.24.0.txt

@@ -669,7 +669,7 @@ Indexing
 - Bug where indexing with a Numpy array containing negative values would mutate the indexer (:issue:`21867`)
 - Bug where mixed indexes wouldn't allow integers for ``.at`` (:issue:`19860`)
 - ``Float64Index.get_loc`` now raises ``KeyError`` when boolean key passed. (:issue:`19087`)
-- :class:`Index` no longer mangles None, NaN and NaT (:issue:`22332`)
+- :class:`Index` no longer mangles ``None``, ``NaN`` and ``NaT``, i.e. they are treated as three different keys. However, for :class:`NumericIndex` all three are still coarsed to a ``NaN`` (:issue:`22332`)
 
 
 Missing
@@ -678,7 +678,7 @@ Missing
 - Bug in :func:`DataFrame.fillna` where a ``ValueError`` would raise when one column contained a ``datetime64[ns, tz]`` dtype (:issue:`15522`)
 - Bug in :func:`Series.hasnans` that could be incorrectly cached and return incorrect answers if null elements are introduced after an initial call (:issue:`19700`)
 - :func:`Series.isin` now treats all nans as equal also for `np.object`-dtype. This behavior is consistent with the behavior for float64 (:issue:`22119`)
-- :func:`unique` no longer manges NaN-float-values and `pd.NaT` (:issue:`22295`)
+- :func:`unique` no longer manges NaN-float-values and ``NaT`` (:issue:`22295`)
 
 MultiIndex
 ^^^^^^^^^^