Earlier quoted context omitted.
I did the searching you mention, and I found the info you mention. But the link sucks on its own, for it to the #1 on HN, in my opinion. The page is written with the philosophy: if you don't know what all these terms are, you don't belong here. Which is fine for a random Github repo. I'd be curious to know about HN's sorting algorithms, this topic seems such a niche thing that I'm amazed this page reached #1...
I personally believe it's natural to know what these things are when you're browsing a site called "Hacker News".
On top of that "hacker" doesn't come from the popular term, it comes from: http://catb.org/jargon/html/introduction.html