An editor connected to a file get a title like 'abc.py - path/to/abc.py (3.11.0)'. (But see #65787.) The Shell starts with 'IDLE Shell 3.11.0' and if saved, adds path and duplicate version. Instead, start with "IDLE Shell - (3.11.0) and insert path if saved.
Default file type is currently .py. I think it should be .txt unless and until add Save Code is added.
Could consider similar with new file. Grep title probably OK. Also note #3701 (unsaved indicator).
Linked PRs