# File lib/cfpropertylist/rbLibXMLParser.rb, line 31
    def to_str(opts={})
      doc = LibXML::XML::Document.new

      doc.root = LibXML::XML::Node.new('plist')
      doc.encoding = LibXML::XML::Encoding::UTF_8

      doc.root['version'] = '1.0'
      doc.root << opts[:root].to_xml(self)

      # ugly hack, but there's no other possibility I know
      str = doc.to_s(:indent => opts[:formatted])
      str1 = String.new
      first = false
      str.each_line do |line|
        str1 << line
        unless(first) then
          str1 << "<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" if line =~ /^\s*<\?xml/
        end

        first = true
      end

      str1.force_encoding('UTF-8') if str1.respond_to?(:force_encoding)
      return str1
    end