Markdown-only composer: Can't emphasize line of text with a bold word at the end

[lindsey (Lindsey Fogle)]

Overview

In the Markdown-only composer (i.e. not the new composer mode we’re currently testing on Meta), when trying to italicize a line of text where the last word of that text is bolded, the first letter is removed from the line, and the * is removed from the end, and the line does not get converted to italics.

Steps to reproduce

1. In the Markdown-only composer, write a line where the last word is bolded, e.g.

This is a super edge case where the last word in a sentence is **bolded.**

2. Highlight the line and use CMD+I or the toolbar shortcut to italicize.

Expected results

The line should read:

*This is a super edge case where the last word in a sentence is **bolded.***

Observed results

The line reads:

his is a super edge case where the last word in a sentence is **bolded.*

Additional context