bug#48902: 28.0.50; Directory names containing apostrophes and backticks cause problems

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Mon, 07 Jun 2021 16:24:44 +0200
> Cc: Alan Third <alan@idiocy.org>,
>  Rudolf Adamkovič <salutis@me.com>
> 
> larsi@emkay trunk % mkdir /tmp/fóo 
> larsi@emkay trunk % cp etc/images/gnus/gnus.png /tmp/fóo/
> larsi@emkay trunk % ./src/emacs /tmp/fóo/
> 
> And then RET the file to test.  I then get an error message about
> failed output type 'public.tiff' on the terminal.

What happens if you type

  larsi@emkay trunk % ./src/emacs /tmp/fóo/gnus.png

does it show the PNG image then?

And what are the values of file-name-coding-system and
default-file-name-coding-system?