[3.13] gh-96491: Deduplicate version in IDLE shell title (GH-139841) (#139932)

gh-96491: Deduplicate version in IDLE shell title (GH-139841)

Saving to a file added both the filename and repeated the version.
---------
(cherry picked from commit d4e5802588db3459f04d4b8013cc571a8988e203)

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>