Bug report

Bug description:

To reproduce:

• Start IDLE by launching the IDLE.app included with our installers
• Create a new file or open an existing file
• Modify that file by typing into it
• Quit IDLE

Expected behaviour:

• IDLE warns about unsaved open files before quitting

Actual behaviour:

• IDLE quits without warning, losing work

CPython versions tested on:

3.11, 3.12, 3.13

Operating systems tested on:

macOS

Linked PRs

• gh-112898: warn about unsaved files when quitting IDLE on macOS #112939
• [3.12] gh-112898: warn about unsaved files when quitting IDLE on macOS (GH-112939) #112960
• [3.11] gh-112898: warn about unsaved files when quitting IDLE on macOS (GH-112939) #112961
• gh-112898: Remove the false "Cancel" button in the "Save On Close" msgbox #112994
• gh-112898: Fix double close dialog with warning about unsafed files #113513