I remember some talk in the sandbox about links with _ and they become italic and not the link. But I forget how to go around that… 
It isn’t super important, but I’ve idea someone had a solution… 
for a example: https://en.wikipedia.org/wiki/Everything,_Everything_(novel) will become https://en.wikipedia.org/wiki/Everything,Everything(novel)
Use the backslash character to escape the underscore like this:
https://en.wikipedia.org/wiki/Everything,\_Everything_(novel)
I had reported this to the Discourse team at the time and they shared a tip that makes this easier to handle: wrap the links in brackets, like this:
<https://en.wikipedia.org/wiki/Everything,_Everything_(novel)>
This way you don’t need to escape the problematic characters or even find which one is playing funny.
