Reduce the amount of escaping in typst math writer

[memeplex]

Describe your proposed improvement and the problem it solves.

When translating simple expressions like:

$r_i(c, c_M)$

the writer adds a lot of seemingly unnecessary escape sequences to parentheses and commas:

$r_i \( c \, c_M \)$

Probably this simplify the code and/or ensure against some corner cases that I can't think of, but it certainly clutters the code which can be an inconvenience for progressive markdown -> typst approaches.

[jgm]

For commas, see #242

[jgm]

For parens, note that these are distinct in typst:

$frac\(x, y\)$

$frac(x, y)$

Admittedly, nobody is likely to want to write the former, but it's hard to predict when such cases might come up.

[memeplex]

Yes, I know, indeed I have recently asked about that in their forum: https://forum.typst.app/t/how-to-keep-parentheses-small/3571

But it's a good point and IMO that may be a reason not to escape by default, since the expectation in Typst is for parentheses to adapt their size to their contents. That said, the expectation in LaTeX is for parentheses not to adapt to their contents unless explicitly told so. So it's a bit of a cultural clash, it may be more strict to escape bare LaTeX parentheses but the result is certainly unusual for a Typst document.

[jgm]

I'm not actually talking about parentheses size. I'm talking about the fact that in the second equation frac is being called as a typst function, whereas in the first, you just have the word frac followed by some parenthesized content.

LaTeX versions; $\textit{frac}(x, y)$ vs $\frac{x}{y}$.