[PATCH] [3.11] gh-118643: Fix AttributeError in the email module (GH-119099) (#119393)

[PATCH] [3.11] gh-118643: Fix AttributeError in the email module (GH-119099) (#119393)

Fix regression introduced in gh-100884: AttributeError when re-fold a long
address list.

Also fix more cases of incorrect encoding of the address separator in the
address list missed in gh-100884.
(cherry picked from commit 858b9e85fcdd495947c9e892ce6e3734652c48f2)
(cherry picked from commit 4762b365406a8cf026a4a4ddcae34c28a41c3de9)

Gbp-Pq: Name CVE-2025-1795-2.patch