class Hpricot::Elem

def output(out, opts = {})
  if empty? and ElementContent[@stag.name] == :EMPTY
    @stag.output(out, opts.merge(:style => :empty))
  else
    @stag.output(out, opts)
    @children.each { |n| n.output(out, opts) }
    if @etag
      @etag.output(out, opts)
    elsif !opts[:preserve]
      ETag.new(@stag.name).output(out, opts)
    end
  end
  out
end