Towards the very beginning we have:

	// Save a reference to some core methods
	toString = Object.prototype.toString,
	hasOwn = Object.prototype.hasOwnProperty,
	push = Array.prototype.push,
	slice = Array.prototype.slice,
	trim = String.prototype.trim,
	indexOf = Array.prototype.indexOf,

and then we have:

	push: push,
	sort: [].sort,
	splice: [].splice

Why not be more consistent and concise by writing the first part

	// Save a reference to some core methods
	toString = {}.toString,
	hasOwn = {}.hasOwnProperty,
	push = [].push,
	slice = [].slice,
	trim = ''.trim,
	indexOf = [].indexOf,