Changes history

(Only outstanding content changes listed, the texts and code are constantly updated and fixed thanks to awesome contributors.)

2019-12-27

2.7 changelog added!
~In 2.7 changelog, links to docs sometimes switched to “official” docs.ruby-lang.org website. Most of the time, we are linking to ruby-doc.org, which, while being unofficial, has two advantages: a) it looks a bit nicer and b) it doesn’t mix what is in core and what came from standard libraries. Unfortunately, as of release date of 2.7, ruby-doc.org’s rendering is unable to properly handle new core methods implemented in .rb files (compare GC docs on official site, and on ruby-doc.org)~ ruby-doc.org was fixed!
Atom feed added to the site, allowing to put it in your favorite aggregator (yes, I am aware it is almost 2020 and nobody does this anymore).

2.4 changelog added;
2.5 and 2.6 updated significantly with missing details/recent updates and mentions of upcoming (in 2.7) changes;
“Highlights” added to the top of the each release with short (and subjective) list of the most visible changes;
Book styles updated a bit for easier reading;
More metainformation about each version added to its page (initial release date, current status, etc.).