 		the back of the List.
 	*/
 	public var cursorAtBack: Bool {
-		return nil == current
+		return nil === current
 	}
 
 	/**

		the front of the List.
	*/
	public var cursorAtFront: Bool {
		return nil == current
	}

	/**

		var output: String = "("
		var c: Int = 0
		var x: NodeType? = head
		while nil !== x {
			output += x!.description
			if ++c != count {
				output += ", "
