Add pointer to IDLE what's new file.
diff --git a/Doc/whatsnew/3.5.rst b/Doc/whatsnew/3.5.rst
index c46ed9b..dea8276 100644
--- a/Doc/whatsnew/3.5.rst
+++ b/Doc/whatsnew/3.5.rst
@@ -437,6 +437,15 @@
subdirectories using the "``**``" pattern.
(Contributed by Serhiy Storchaka in :issue:`13968`.)
+ idlelib and IDLE
+----------------
+
+Since idlelib implements the IDLE shell and editor and is not intended for
+import by other programs, it gets improvements with every release. See
+:file:`Lib/idlelib/NEWS.txt` for a cumulative list of changes since 3.4.0,
+as well as changes made in future 3.5.x releases. This file is also available
+from the IDLE Help -> About Idle dialog.
+
imaplib
-------