Update comment in shuf

quiz.js

 // This horrible file is distributed under the CC0 license.  Consult
 // ./LICENSE for more details.
 
-// $Id: quiz.js,v 1.2 2024/01/11 16:19:30 oj14ozun Exp oj14ozun $
+// $Id: quiz.js,v 1.3 2024/01/12 10:15:28 oj14ozun Exp oj14ozun $
 
 "use strict";
 
@@ -27,8 +27,7 @@ var opts  = [];			// DOM objects of each answer
 
 var progress = JSON.parse(window.localStorage.getItem("progress")) || {};
 
-function shuf(arr) {
-    // shuffle option-order using Fisher–Yates shuffle
+function shuf(arr) {	     // shuffle arr using Fisher–Yates shuffle
     for (let i = 0; i < arr.length - 1; i++) {
 	const j = Math.floor(Math.random() * arr.length);
 	const tmp = arr[j];