Subject: bug#39290: [PATCH] Correct regexp for flags in 'format' doc string

From: Eli Zaretskii <[email-masked]>
Date: Sun, 26 Jan 2020 21:19:13 +0200

> From: Paul Eggert <[email-masked]>
> Date: Sun, 26 Jan 2020 10:08:17 -0800
> Cc: [email-masked]
> 
> Thanks, I installed that in your name into the emacs-27 branch. I think doc 
> fixes like that are still good for the emacs-27 branch.

Doc fixes are always good for the release branch.  It's in CONTRIBUTE.