[3.12] gh-120276: Fix incorrect email.header.Header maxlinelen default (GH-120277)#120278

serhiy-storchaka merged 1 commit intopython:3.12python/cpython:3.12from

miss-islington:backport-7c016de-3.12miss-islington/cpython:backport-7c016de-3.12Copy head branch name to clipboard