[3.12] IDLE: Tweak iomenu.IOBinding.maybesave (GH-112914) (#112917)

Add docstring, use f-string, simplify code.
(cherry picked from commit ca1bde894305a1b88fdbb191426547f35b7e9200)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Miss Islington (bot) committed 2y ago

fd5d3aec2a9a983ad155f7aa7907a5bcd8a4a19e

Parent: b23034d

Committed by GitHub <noreply@github.com> on 12/10/2023, 2:56:28 AM