bpo-35770: Fix off-by-1 error. (GH-11618)
(cherry picked from commit 2cf1ddaff4c869780d9e796b21ef3e506f8ad321)
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/macosx.py b/Lib/idlelib/macosx.py
index d6a1b37..eeaab59 100644
--- a/Lib/idlelib/macosx.py
+++ b/Lib/idlelib/macosx.py
@@ -178,7 +178,7 @@
del mainmenu.menudefs[-1][1][0:2]
# Remove the 'Configure Idle' entry from the options menu, it is in the
# application menu as 'Preferences'
- del mainmenu.menudefs[-3][1][0:1]
+ del mainmenu.menudefs[-3][1][0:2]
menubar = Menu(root)
root.configure(menu=menubar)
menudict = {}