bug#55477: 29.0.50; flymake-goto-next-eror shows terminal like color codes in mini buffer

[Eli Zaretskii]

> Cc: 55477@debbugs.gnu.org
> From: Pankaj Jangid <pankaj@codeisgreat.org>
> Date: Wed, 18 May 2022 09:02:14 +0530
> 
> > (text-quoting-style)
> > => curve
> >
> > here, but it should have returned nil in the en_IN environment you were
> > in, apparently.
> 
> The above expression is returning "curve"; in all three environments,
> 
> en_US.UTF-8
> en_IN.UTF-8
> en_IN

What is the value of

  (default-value 'buffer-file-coding-system)

in each of the 3 environments?

And also what does the below return in each of the 3 environments?

  (char-displayable-p ?‘)