bug#50658: Error messages including function names violates coding conventions

[Eli Zaretskii]

> From: Stefan Kangas <stefan@marxist.se>
> Date: Tue, 28 Sep 2021 05:11:23 -0700
> Cc: 50658@debbugs.gnu.org
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> +Invalid input''.  This convention is better avoided in most cases.
> >
> > That last sentence is unexpected, and seems to contradict everything
> > you wrote before it.  Which convention should be avoided, and why?
> 
> To be honest, I was a bit unsure about this sentence.  I guess I'm
> trying to say "don't overdo it" or "don't do it by default just because
> you can".
> 
> But perhaps this is already clear from the rest of the text?

Yes, I think it is.