/*
 * call-seq:
 *  new(version = default)
 *
 * Create a new document with +version+ (defaults to "1.0")
 */
static VALUE new(int argc, VALUE *argv, VALUE klass)
{
  xmlDocPtr doc;
  VALUE version, rest, rb_doc ;

  rb_scan_args(argc, argv, "0*", &rest);
  version = rb_ary_entry(rest, (long)0);
  if (NIL_P(version)) version = rb_str_new2("1.0");

  doc = xmlNewDoc((xmlChar *)StringValuePtr(version));
  rb_doc = Nokogiri_wrap_xml_document(klass, doc);
  rb_obj_call_init(rb_doc, argc, argv);
  return rb_doc ;
}