lib/dom.js
function(el, sub) {
    sub = normalize(sub);

    el.parentNode.insertBefore(sub, el);
    return sub; 
  }
function(el, sub) {
    sub = normalize(sub);

    el.parentNode.insertBefore(sub, el);
    return sub; 
  }
function ( el , sub ) { sub = normalize ( sub ) ; el . parentNode . insertBefore ( sub , el ) ; return sub ; }
"insert that before this"
insert that before this