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

miss-islington · Dreamsorcerer · web-flow · commit 0523f6de1f6f · 2023-06-28T16:36:25.000+05:30
gh-105993: Add possible `None` return type to `asyncio.EventLoop.start_tls` docs (GH-105995) (cherry picked from commit 6b52a58) Co-authored-by: Sam Bull <git@sambull.org>
diff --git 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
