Changes history

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


  • 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.).


  • Ruby 2.5 changelog added


  • Initial release (2.6 only)