bug#57066: 29.0.50; Complex emoji overlaps with text

[Eli Zaretskii]

> From: Protesilaos Stavrou <info@protesilaos.com>
> Cc: 57066@debbugs.gnu.org
> Date: Tue, 09 Aug 2022 20:41:42 +0300
> 
> > Why is buffer-file-coding-system nil?  Isn't that in *scratch*?
> 
> Yes, it is *scratch*.
> 
> - emacs -Q
> - Insert buffer-file-coding-system
> - C-j
> - Returns 'nil'

<Shrug> strange.  What is the default value?  That is

   M-: (default-value 'buffer-file-coding-system) RET