lib/fase-2/subtree.js
function attrStringify(attr) {
  var names = Object.keys(attr);
  var str = '';
  for (var i = 0, l = names.length; i < l; i++) {
    str += names[i] + '="' + attr[names[i]].slice(0, 20) + (attr[names[i]].length > 20 ? '...' : '') + '" ';
  }
  return str;
}
function attrStringify(attr) {
  var names = Object.keys(attr);
  var str = '';
  for (var i = 0, l = names.length; i < l; i++) {
    str += names[i] + '="' + attr[names[i]].slice(0, 20) + (attr[names[i]].length > 20 ? '...' : '') + '" ';
  }
  return str;
}
A secret little gem, you can use to print out the subtree :)