class Hpricot::DocType

def initialize target, pub, sys
  self.target, self.public_id, self.system_id = target, pub, sys
end

def output(out, opts = {})
  out <<
    if_output(opts) do
      "<!DOCTYPE #{target} " +
        (public_id ? "PUBLIC \"#{public_id}\"" : "SYSTEM") +
        (system_id ? " #{html_quote(system_id)}" : "") + ">"
    end
end

def pathname; "doctype()" end