bug#52554: 28.0.90; mm-inline-media-tests customization breaks .emacs reading

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: schwab@linux-m68k.org,  52554@debbugs.gnu.org
> Date: Fri, 17 Dec 2021 09:45:17 +0100
> 
>     >> >> I'd rather think that custom-save-variable should bind
>     >> >> print-escape-control-characters to t.
>     >> 
>     Eli> Maybe we should do both?
>     >> 
>     >> In `custom-save-all' perhaps? There are many code paths for saving
>     >> customizations, they donʼt all go via `custom-save-variable'.
> 
>     Eli> If they all go through custom-save-all, then I think it should be 
> done
>     Eli> there, yes.
> 
> OK, Iʼll run with the following for a while, and see if anything crops
> up.

Thanks.