Were these file changes in the recent commit in p5-website repo directly generated from grunt yui?
yes. this was incorrect I realize now. the docs were out of date for reference building. working on a revert..
@vipulrawat more over here: https://github.com/processing/p5.js/commit/da936b4740b60b354f606863ad54a82359440d7e#r31337713
Working on this right now. Will update when done.
I think reference page on the website got reverted to the old version again.