Href content gets italicized if it has underscores in it

[yoonsjeong]

The current markdown parser prioritizes italicizing text over creation of hrefs, which causes some funny side effects in the case that the linked text contains underscores.

Reproduction steps

Create a link, where the clickable text contains underscores. E.g.

[link_to_file.txt](https://www.example.com)

Expected behavior:

Displays a reference like this:

link_to_file.txt

Actual behavior:

Displays the reference like this:

linktofile.txt