# File lib/net/ssh/prompt.rb, line 64
      def prompt(prompt, echo=true)
        @seen_warning ||= false
        if !echo && !@seen_warning
          $stderr.puts "Text will be echoed in the clear. Please install the HighLine or Termios libraries to suppress echoed text."
          @seen_warning = true
        end

        $stdout.print(prompt)
        $stdout.flush
        $stdin.gets.chomp
      end