[docs] [issue37149] link to official documentation tkinter failed !!!

Terry J. Reedy <tjreedy@udel.edu> added the comment: The 2.7 backport shows a clean 2.7 diff, Travis merged and passed it, but required Appveyor just says 'non-mergeable' with no details, and no way to discover why or to cleanly retry. I will try close and open once. ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue37149> _______________________________________