What does "DL is deprecated, please use Fiddle" mean?

Question

Ruby on Rails

Hello Habr!
RoR beginner. When working with the console, it displays the message "Dl is deprecated, please use Fiddle." So far, everything seems to be working, but if it's not difficult, can you tell me what kind of violin it is and what it plays? And what is DL?

Answer 1

stackoverflow.com/questions/15590450/ruby-2-0-0p0-...