gh-102628: Fix sqlite3 CLI prompt in IDLE on Windows

[erlend-aasland]

• Issue: Prompt text in sqlite3 CLI (new in 3.12) is Linux oriented and doesn't apply to Windows #102628

[erlend-aasland]

Skipping NEWS; the entry from #103898 covers this PR also.

[terryjreedy]

I would have just modified the conditional expression, wherever located by adding and 'idlelib.run' not in sys.modules. platform and the idlelib condition are effectively constants.

Or reversed the condition as you did to
eofkey = "CTRL-D" if sys.platform != "win32" or "idlelib.run" in sys.modules else "CTRL-Z"
I agree that 'default if this or that else special' is easier to read.

[erlend-aasland]

Thanks; I modified the condition and blew it up to a full if...else, I believe it looks better like that. The inlined if got way too long IMO.