[docs] [issue42061] Document __format__ method for IPv[46]Address

Teugea Ioan-Teodor <teodor.teugea@gmail.com> added the comment: Hi. I would like to work on the documentation for the IP address format. I am new here so it might take me some time. I think it will have a PR ready in a day or two. ---------- nosy: +John-Ted _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue42061> _______________________________________