The docs were ambiguous about whether you pass in a coroutine function
or a coroutine object, e.g. is it:
aestack.push_async_exit(some_async_func)
or
aestack.push_async_exit(some_async_func())
(It's the first one.)
.. method:: push_async_exit(exit)
Similar to :meth:`push` but expects either an asynchronous context manager
- or a coroutine.
+ or a coroutine function.
.. method:: push_async_callback(callback, *args, **kwds)
- Similar to :meth:`callback` but expects a coroutine.
+ Similar to :meth:`callback` but expects a coroutine function.
.. method:: aclose()