Re: Small typo in calc.texi

[Eli Zaretskii <eliz@gnu.org>]

> From: Vladimir Nikishkin <lockywolf@gmail.com>
> Cc: emacs-devel@gnu.org
> Date: Tue, 13 Jun 2023 21:08:00 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: Vladimir Nikishkin <lockywolf@gmail.com>
> >> Cc: emacs-devel@gnu.org
> >> Date: Tue, 13 Jun 2023 20:10:40 +0800
> >> 
> >> >> @expr{C_{(-1)}} corresponds to the midi note number 0
> >> >
> >> > Are you sure?  Texinfo in general doesn't allow unadorned { or }.
> >> >
> >> > What is the problem with @expr{C_(-1)}?
> >> 
> >> What does "unadorned" mean?
> >
> > The literal characters '{' and '}'.
> 
> I am not a pro on GNU texinfo. I just replaced
> 
> @expr{C_(-1)} with @expr{C_{(-1)}}
> 
> , despite syntax checker's complaints,
> and run make pdf. And the resulting pdf looks the way it should look,
> with all of (-1) in the sub-index.
> 
> I am not sure if that is the way it should be solved, or it is just a
> co-incidence that it works for the pdf output.

What happens in the HTML output?

Anyway, since @expr is just an alias for @math, I guess we need some
TeX expert to help us out here.  Anyone?

Btw, please in the future report any bugs, including these tiny ones,
to bug-gnu-emacs, so that they open an issue that can be tracked.
TIA.