code: def render(statuses, elapsed_time) #:nodoc:
          fail = statuses.all?{|s| s.success?}
          headers = {
            "Content-Type" => "text/plain; charset=utf8",
            "Cache-Control" => "no-cache",
            "Date" => Time.now.httpdate,
          }
          
          messages = []
          statuses.each do |status|
            status.messages.each do |m|
              messages << "#{m.ok? ? 'OK:  ' : 'FAIL:'} #{status.name} - #{m.message} (#{status.time ? sprintf('%0.000f', status.time * 1000) : '?'}ms)"
            end
          end
          
          info = []
          info << "Host: #{@hostname}" unless @hostname.size == 0
          info << "PID:  #{$$}"
          info << "Timestamp: #{Time.now.iso8601}"
          info << "Elapsed Time: #{(elapsed_time * 1000).round}ms"
          
          code = (fail ? 200 : 500)
          
          [code, headers, [info.join("\n"), "\n\n", messages.join("\n")]]
        end
docs: Output the plain text response from calling all the filters.