Added bugfix pandas-dev#21356 to whatsnew doc under 0.24v

daminisatya · daminisatya · commit 2ac19b5cd318 · 2018-06-07T12:13:55.000-07:00
diff --git a/doc/source/whatsnew/v0.24.0.txt b/doc/source/whatsnew/v0.24.0.txt
@@ -80,6 +80,8 @@ Documentation Changes
 Bug Fixes
 ~~~~~~~~~
 
+- The top level None value is not dropped but rather preserved along with lower levels for consistency (:issue:`21356`)
+
 Categorical
 ^^^^^^^^^^^
 
