bug#59921: 30.0.50; emacs HEAD is missing some older emacs-29 commits

[Eli Zaretskii]

> Cc: 59921@debbugs.gnu.org
> From: Brian Leung <leungbk@posteo.net>
> Date: Fri, 09 Dec 2022 12:43:12 +0000
> 
> 
> > Doesn't this mean that these commits are on the master branch?
> 
> I arrived at a similar conclusion using Magit. I don't have a 
> great understanding of Git, so my best guess is that 64c7b57ae72 
> somehow skipped over more commits than expected. You can verify 
> that the changes corresponding to the missing commits are present 
> in the emacs-29 branch but not in master.

How did you detect the missing changes in the first place?