Partial glowing text in code block (related to #24)

[TheodoreHua]

The issue stated in #24 still happens when the glowing text is just a part of a code highlighting. For example today (Day 04, Part 1), shows as .

With how markdown works I'm pretty sure partial italic in a code block can't be achieved, but at the very least the syntax for it should be removed to have 188 * 24 = 4512 instead of 188 * 24 = _4512_.

[kfarnung]

Submitted the update for review, looks like it's already published in the Firefox store, but still pending for Chrome and Edge.