https://thoughtbot.com/blog/tab-completion-in-gnu-readline-ruby-edition
Tab completion in GNU Readline: Ruby edition
Learn about the new Readline features coming to Ruby soon.
tab completiongnu readlinerubyedition
https://thoughtbot.com/blog/tab-completion-in-gnu-readline
Tab completion in GNU Readline
Learn how to use GNU Readline's powerful tab completion features in your own applications.
tab completiongnureadline