[docs] [issue23251] mention in time.sleep() docs that it does not block other Python threads

Georg Brandl added the comment: Agreed. "of the current thread" is a good addition. The sleep() docs are already longer than I would like. ---------- nosy: +georg.brandl _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue23251> _______________________________________