What is “ruby-completion” Package?

Bash completion for Ruby
For more details: https://github.com/mernen/completion-ruby

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install ruby-completion.

  brew install ruby-completion

Now, use ruby-completion!