[docs] [issue24692] types.coroutines() idempotence documentation

Martin Panter added the comment: Going by Yury’s tests and implementation, I think it is intended that: * An “async def” coroutine factory function is accepted and passed through unmodified * An generator–coroutine factory function that has already been transformed is also accepted * If a wrapped function (not a normal coroutine nor generator factory) returns a coroutine instance (e.g. if the function was already decorated), the return value is never wrapped a second time I will have a go at writing this up. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue24692> _______________________________________