bug#58507: Emacs does not preserve the coding system

[Eli Zaretskii]

> From: Juhana Sadeharju <johanrainhill@gmail.com>
> Date: Fri, 14 Oct 2022 09:02:25 +0300
> 
> Hello. I did set the coding system to utf-8 but at quit/restart the file goes 
> to iso-latin-dos and chars such as ä
> and ö becomes unreadable. Windows 11. Both the latest Emacs and older version 
> 25.3 has this same
> problem.

Please tell the details: how did you set coding system to utf-8, and
how did you see that the file goes to iso-latin-dos.  We need these
details to investigate the problem.

Thanks.