Prompt text in sqlite3 CLI (new in 3.12) is Linux oriented and doesn't apply to Windows

[Dutcho]

Bug report

The command line command python3.12 -m sqlite3 gives a prompt stating "[...]Type ".help" for more information; type ".quit" or CTRL-D to quit."
But on Windows, the Unixism CTRL-D doesn't work (instead, and after adding ";" and "ENTER", it reports: "OperationalError (SQLITE_ERROR): unrecognized token: "♦"" ); CTRL-Z does work on Windows (but not on Linux, I guess).

Request to clarify the prompt.

Environment

• CPython: Python 3.12.0a6 (tags/v3.12.0a6:f9774e5, Mar 7 2023, 23:52:43) [MSC v.1934 64 bit (AMD64)]
• Operating system: MS Windows 3.11 Pro
• Architecture: Intel i5

Linked PRs

• gh-102628: Fix sqlite3 CLI promt text on Windows #103898
• gh-102628: Fix sqlite3 CLI prompt in IDLE on Windows #103945

[terryjreedy]

I corrected sqlite to sqlite3 in the startup command. ^Z must be followed by to exit, but windows users should know that.

CTRL-D is in sqlite3.__main__ in the 'banner' f-string. To fix, replace D with {exitchar} and define exitchar above the banner assignment. I may do it later.

EDIT: A complication is that ^D is correct for IDLE even on Windows. I have no idea what would be correct for other IDEs.

[erlend-aasland]

Perhaps the easiest thing to do would be to adjust the banner depending on which platform we're running on. For *nix, we can recommend CTRL-D, for Windows, we can recommend CTRL-Z.