I know I'm just talking to myself at this point, but I _finally_ get the meaning of the linked article title.

The netlify app is a fork, like a code fork, of the original document. Which is to say, they have taken the original work, transcribed it to a digital format, and will now evolve it.

I don't know if that just went way over my head or if it was not clearly communicated, but there you have it.