ENH: gb.is_monotonic_increasing pandas-dev#17015 fix changed whatsnew

Author: No-Stream

doc/source/whatsnew/v0.21.0.txt

@@ -1172,3 +1172,4 @@ Other
 ^^^^^
 - Bug where some inplace operators were not being wrapped and produced a copy when invoked (:issue:`12962`)
 - Bug in :func:`eval` where the ``inplace`` parameter was being incorrectly handled (:issue:`16732`)
+

doc/source/whatsnew/v0.22.0.txt

@@ -139,7 +139,7 @@ Other Enhancements
 - :func:`read_excel()` has gained the ``nrows`` parameter (:issue:`16645`)
 - :func:``DataFrame.to_json`` and ``Series.to_json`` now accept an ``index`` argument which allows the user to exclude the index from the JSON output (:issue:`17394`)
 - :meth: groupby.is_monotonic_increasing and :meth: .is_monotonic_decreasing extend :meth: Series.is_monotonic_increasing to groups, returning whether each group is monotonically increasing or decreasing, respectively. (:issue:`17015`)
-- 
+-
 
 .. _whatsnew_0220.api_breaking: