sorted_groups

# File railties/lib/rails/command.rb, line 89
      def sorted_groups # :nodoc:
        lookup!

        groups = (subclasses - hidden_commands).group_by { |c| c.namespace.split(":").first }
        groups.transform_values! { |commands| commands.flat_map(&:printing_commands).sort }

        rails = groups.delete("rails")
        [[ "rails", rails ]] + groups.sort.to_a
      end