add whatsnew note

pandas-dev · jreback · Jan 6, 2018 · Nov 19, 2017 · Nov 19, 2017 · Nov 20, 2017
commit 2d68f0154cfbb4eafa65ba87ba70361be21a8a2d
diff --git a/doc/source/whatsnew/v0.22.0.txt b/doc/source/whatsnew/v0.22.0.txt
@@ -352,4 +352,4 @@ Other
 ^^^^^
 
 - Improved error message when attempting to use a Python keyword as an identifier in a numexpr query (:issue:`18221`)
--
+- Fixed bug where comparing :class:`DatetimeIndex` failed to raise ``TypeError`` when attempting to compare timezone-aware and timezone-naive datetimelike objects (:issue:`18162`)
-Original file line number
+Diff line change
@@ Expand Up / @@ -352,4 +352,4 @@ Other @@
     ^^^^^
     - Improved error message when attempting to use a Python keyword as an identifier in a numexpr query (:issue:`18221`)
-    -
+    - Fixed bug where comparing :class:`DatetimeIndex` failed to raise ``TypeError`` when attempting to compare timezone-aware and timezone-naive datetimelike objects (:issue:`18162`)