Eric V. Smith added the comment: Oops, I missed the "should be documented" part of your message. That's true, and I'll leave this open. But I'll change it to a doc request and assign it accordingly. ---------- assignee: eric.smith -> docs@python components: +Documentation -Interpreter Core nosy: +docs@python resolution: invalid -> status: closed -> open title: API breakage in string formatting with :s option -> API change in string formatting with :s option should be documented in What's New. _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue20150> _______________________________________