[docs] [issue12704] Language References does not specify exception raised by final yield()

Changes by Nikolaus Rath <Nikolaus@rath.org>: ---------- versions: +Python 3.1, Python 3.2, Python 3.3, Python 3.4 _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue12704> _______________________________________