nested links inside tex-math are not "flattened"

[pkra]

In tran8954 we have a case of nested links inside tex-math. While this use case may be resolved upstream, it raises the problem that xref.js currently does not flatten nested links inside tex-math because

texml-to-html/lib/elements/xref.js

Line 38 in 8f3d987

const isNestedLink = htmlParentNode.closest('a');

won't be true - we're rewriting to TeX markup.

[pkra]

Link upstream in AmerMathSoc/texml#198 (comment)

[pkra]

I tested if MathJax's new feature to embed HTML tags inside TeX might be a way around thi https://docs.mathjax.org/en/latest/input/tex/extensions/texhtml.html. However, it crashed when nesting math mode inside the html markup.