message: replace className split
diff: @@ -1800,7 +1800,7 @@ function htmlElementAsString(elem) {
  className = elem.className;
  if (className && isString(className)) {
  - classes = className.split(' ');
  + classes = className.split(/\s+/);
  for (i = 0; i < classes.length; i++) {
  out.push('.' + classes[i]);
  }
  