Issue #22346: also include asyncio PEP 411 notice in 3.4
diff --git a/Doc/library/asyncio.rst b/Doc/library/asyncio.rst
index 90a152b..fb1d659 100644
--- a/Doc/library/asyncio.rst
+++ b/Doc/library/asyncio.rst
@@ -4,6 +4,13 @@
.. module:: asyncio
:synopsis: Asynchronous I/O, event loop, coroutines and tasks.
+.. note::
+
+ The asyncio package has been included in the standard library on a
+ :term:`provisional basis <provisional package>`. Backwards incompatible
+ changes (up to and including removal of the module) may occur if deemed
+ necessary by the core developers.
+
.. versionadded:: 3.4
**Source code:** :source:`Lib/asyncio/`