[3.11] gh-105993: Add possible `None` return type to `asyncio.EventLoop.start_tls...

gh-105993: Add possible `None` return type to `asyncio.EventLoop.start_tls` docs (GH-105995)
(cherry picked from commit 6b52a581c151914e59c8c367a03bc7309713a73b)

Co-authored-by: Sam Bull <git@sambull.org>

diff --git a/Doc/library/asyncio-eventloop.rst b/Doc/library/asyncio-eventloop.rst
index 3644c17c6b37c45f8788bc7c80d1eccff9a10534..d6aab2a5fce1b04566ffbb13cbd28d971c113e18 100644 (file)
--- a/Doc/library/asyncio-eventloop.rst
+++ b/Doc/library/asyncio-eventloop.rst
@@ -878,6 +878,9 @@ TLS Upgrade
    object only because the coder caches *protocol*-side data and sporadically
    exchanges extra TLS session packets with *transport*.
 
+   In some situations (e.g. when the passed transport is already closing) this
+   may return ``None``.
+
    Parameters:
 
    * *transport* and *protocol* instances that methods like