Among the new features shipped with Ruby 2.4 is improved Unicode support. Specifically, methods like upcase and downcase work as expected, turning "ä" to "Ä" and back. This made me curious: what other Unicode improvements have been made since 2013 when I read André Arko's blog post Strings in Ruby are UTF-8 now… right?? I tested all of Ruby's string methods, not looking for technical errors but