[docs] [issue17576] PyNumber_Index() is not int-subclass friendly (or operator.index() docos lie)

Changes by Arfrever Frehtes Taifersar Arahesis <Arfrever.FTA@GMail.Com>: ---------- nosy: +Arfrever _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue17576> _______________________________________