Use :menuselection: in whatsnew/3.4.

Doc/whatsnew/3.4.rst

@@ -974,7 +974,7 @@ 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 3.3.0,
 as well as changes made in future 3.4.x releases. This file is also available
-from the IDLE Help -> About Idle dialog.
+from the IDLE :menuselection:`Help --> About IDLE` dialog.
 
 
 importlib