Markdown highlight breaks when adding underscore

[ghost]

Adding underscore to the markdown breaks the markdown highlighting in the editor.

Additional info:
Snapshots from Ace live demo

1. When writing in blockquote
   

2. When writing in plain text
   

Thought it does not break the resultant markdown, text written in a code span works, but highlighting breaks. It highlights as an emphasis but resulting in code span.

Expected behavior
It should not highlight as emphasis instead, code span should take more precedence.

[tessus]

This is a parsing error of the hl engine (or the rules are wrong).

Italics should only be highlighted when surrounded by

• at least one space on both sides
• at least one space on one side and a punctuation character on the other

As you can see here, they are not rendered as italics.

This behavior is really annoying the only way to make text readable is to override .ace_string.ace_emphasis with the color of the standard text.

We use Ace in the project Joplin and hope this will be fixed soon.

[github-actions]

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