function format(node, level) {
  var indentBefore = new Array(level++ + 1).join('  ');
  var indentAfter  = new Array(level - 1).join('  ');
  var textNode;

  for (var i = 0; i < node.children.length; i++) {
    textNode = document.createTextNode('\n' + indentBefore);
    node.insertBefore(textNode, node.children[i]);
    format(node.children[i], level);
    if (node.lastElementChild === node.children[i]) {
      textNode = document.createTextNode('\n' + indentAfter);
      node.appendChild(textNode);
    }
  }
  return node;
}

function jqlite2html(str) {
  if (typeof str !== 'string') { str = str.html(); }

  var div = document.createElement('div');
  div.innerHTML = str.trim();
  return format(div, 0).innerHTML;
}