# File lib/sinatra/link_header.rb, line 117
    def link_headers
      yield if block_given?
      return "" unless response.include? "Link"
      response["Link"].lines.map do |line|
        url, *opts = line.split(';').map(&:strip)
        "<link href=\"#{url[1..-2]}\" #{opts.join " "} />"
      end.join "\n"
    end