# File cli/ruby-debug/commands/list.rb, line 55
      def help(cmd)
        %{
          l[ist]\t\tlist forward
          l[ist] -\tlist backward
          l[ist] =\tlist current line
          l[ist] nn-mm\tlist given lines
          * NOTE - to turn on autolist, use 'set autolist'
        }
      end