# File lib/nokogiri/html.rb, line 41
      def fragment string
        doc = parse(string)
        fragment = XML::DocumentFragment.new(doc)
        finder = lambda { |c, f|
          c.each do |child|
            fragment.add_child(child) if string =~ /<#{child.name}/
          end
          return fragment if fragment.children.length > 0

          c.each do |child|
            finder.call(child.children, f)
          end
        }
        finder.call(doc.children, finder)
        fragment
      end