Re: Small typo in calc.texi

[Eli Zaretskii]

> From: Vladimir Nikishkin <lockywolf@gmail.com>
> Cc: emacs-devel@gnu.org
> Date: Tue, 13 Jun 2023 11:40:44 +0800
> 
> 
> in the "Musical Notes" node:
> 
> @expr{C_(-1)} corresponds to the midi note number 0
> 
> probably should be
> 
> @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)}?