[3.11] IDLE: Tweak iomenu.IOBinding.maybesave (GH-112914) (#112918)

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

671f3d3ccd78c4d74bfc330cc96e66bc29ef9e08

Parent: 8c51e40

Committed by GitHub <noreply@github.com> on 12/10/2023, 2:56:07 AM