[Python-checkins] [3.11] gh-105993: Add possible `None` return type to `asyncio.EventLoop.start_tls` docs (GH-105995) (#106189)

[kumaraditya303]

https://github.com/python/cpython/commit/0523f6de1f6f178a1c4d37872c142fe665ab79da
commit: 0523f6de1f6f178a1c4d37872c142fe665ab79da
branch: 3.11
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: kumaraditya303 <59607654+kumaraditya303 at users.noreply.github.com>
date: 2023-06-28T16:36:25+05:30
summary:

[3.11] gh-105993: Add possible `None` return type to `asyncio.EventLoop.start_tls` docs (GH-105995) (#106189)

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 at sambull.org>

files:
M Doc/library/asyncio-eventloop.rst

diff --git a/Doc/library/asyncio-eventloop.rst b/Doc/library/asyncio-eventloop.rst
index 3644c17c6b37..d6aab2a5fce1 100644
--- 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