To take from javascript, this is a mix of underscore (utility) and, uhh, babel(?) for essentially polyfilling certain runtime features slated for future (hypothetical) approval.

The text is so faint on this web page I hardly want to get through it...

I'm having trouble reading your post, too!

I wonder why? HN has very readable text.

I noticed that too, so I filed a bug in their repo: https://github.com/abseil/abseil.github.io/issues/46

Reader view to the rescue

It's a sad commentary that this is now the de facto correct answer.

Optics => default to _Designer view_. Superflat everything; no affordances.

Pretty! Clean! Broken.

Readable text is overrated in 2017.