gh-81267: Correct time.sleep error message

[StanFromIreland]

• Issue: time.sleep error message misleading #81267

[vstinner]

LGTM

[picnixz]

Question: Shouldn't we have a what's new entry since we changed the error message? If not, I'll close the issue; if so, we can keep it open for the additional what's new entry.

[vstinner]

Question: Shouldn't we have a what's new entry since we changed the error message? If not, I'll close the issue; if so, we can keep it open for the additional what's new entry.

Usually we don't document changed error messages in Changelog nor in "What's New in Python 3.x" documents.

I closed the issue.

[picnixz]

Usually we don't document changed error messages in Changelog nor in "What's New in Python 3.x" documents.

Ah right, we actually had quite a lot of "improve error message of [...]" in the changelog but not in What's New (only error messages that were "important" were actually put there)