Two smaller bugs

[leahneukirchen]

Toying around with latest from 2023-07-13, I found:

\documentclass{article}
\begin{document}

Backslash-Space works in text mode but not math mode: x\ 678.

\[
  x\ 678
\]

This $y$ should be italic:

\[
  3y
\]
\end{document}

[Jazzpirate]

thanks for letting me know - given the current spaghetti-incarnation of rustex, this is a bit annoying to solve, so I would probably fix this during refactoring the whole thing into a proper crate (which I'm actively working on)