Meditation brought about some massive changes for me: increased focus, better and more acute introspection; I became way less irritable and my stress levels reduced.
Frankly, Github did a very poor job at communication this breaking change.
I only recently discovered that most of my post got broken.
Apparently it's no longer legit to use "#Title", you need to "# Title" (and god knows what else).
Linking is broken too - in Jekyll 2 there was no difference if a URL ended in "/" or not - you were just taken to the page, now this is a massive, although fixable pain (see https://github.com/jekyll/jekyll/issues/4440)
As a result my site experienced 500% drop in organic search referrals from Google.
I got no single email from then announcing this change. Very unhappy with how github handled it.
Not sure how the search suggestions are meant to work, but when typing "Drunkard's Walk" I can see the book at the top of the result's list, although when typing the author's name, "Leonard Mlodinow" I get no matches for his books at all.
Not your fault, but I find it quite annoying that most of those documents are not digitised and you have to order the items to be delivered into library's reading rooms.