Re: spurious space after macro expansion in math mode for TeX output

[Gavin Smith]

On Sat, Nov 12, 2022 at 12:26:28PM +0100, Vincent Lefevre wrote:
> The first comment in
> 
>   https://tex.stackexchange.com/a/1932/58921
> 
> says "\begingroup...\endgroup also behaves differently in math mode,
> in which {...} or \bgroup...\egroup create a subformulae with
> different spacing. A good rule of thumb would be to avoid using
> \bgroup...\egroup unless you know you need them."
> 
> So the "subformulae with different spacing" from \bgroup...\egroup
> seems to be the issue. Indeed, the attached patch fixes the issue
> on my test file.

That's great!  I'll test it and make this change.