Joplin: Highlight is buggy when combined with LaTeX equations

[RMeli]

When two distant LaTeX equations contain the symbol _ (used for subscripts in LaTeX and for italic in Mrkdown), the text in between is highlighted as italic text.

The same problem also occurs within the same equation if two _ are present.

Environment

Joplin version: 1.0.201 (e65af8c)
Platform: macOS
OS specifics: 10.14.4

Steps to reproduce

Type the following in a note:

$x_i$ Lorem Ipsum $y_i$.

The text between _ will be highlighted incorrectly as italic: i$ Lorem Ipsum $y

Describe what you expected to happen

I expect _ within equations to be ignored by the highlighter.

[RMeli]

I only see now that this is related to #3054.

[tessus]

https://github.com/ajaxorg/ace/issues/3942

[CalebJohn]

fixed by #3703

[RMeli]

Nice, thanks!