correct indent of comments

javascript code for test :

(function() {
// js file for test

/**
 * make the int second time to string 00:00:00
 * @param {type} second
 * @param {type} digit
 * @returns {String}
 */
    var f = function(second, digit) {
/*
 * some comments
 */
        return (sign + arr.join(':').replace(/\b(\d)\b/g, "0$1"));
    };

    var f2 = function(second, digit) {
        var arr = [],
        sign = '';

        if (0 < second) {
            sign = '+';
        }
    };


// urlError
    var urlError = function() {
/* hahah */
        throw new Error('A "url" property or function must be specified');
    };
})();