It's crowd-sourced from actual people using a browser extension.
(see how I gave you a tl;dr of the link explaining how the tl;dr is generated?)
(see how I gave you a tl;dr of the link explaining how the tl;dr is generated?)
But this page is a bit outdated, this is what we use now: http://tldr.io/tldrs/514d1c2ec02bf6ba46001aba/more-on-the-tl...