def to_html
      output_options = Nokogiri::XML::Node::SaveOptions::DEFAULT_XHTML ^
        Nokogiri::XML::Node::SaveOptions::FORMAT
      @fragment.children.inject("") do |out, child|
        out << child.serialize(:save_with => output_options, :encoding => 'UTF-8')
      end
    end
def to_html
      output_options = Nokogiri::XML::Node::SaveOptions::DEFAULT_XHTML ^
        Nokogiri::XML::Node::SaveOptions::FORMAT
      @fragment.children.inject("") do |out, child|
        out << child.serialize(:save_with => output_options, :encoding => 'UTF-8')
      end
    end
Convert this fragment to an HTML or XHTML string.
 @return [String]