Revert "punycode: Update to v1.0.0"

This reverts commit 483edbdf1a.
Fixes #3359.

lib/punycode.js

@@ -1,4 +1,9 @@
-/*! http://mths.be/punycode by @mathias */
+/*!
+ * Punycode.js <http://mths.be/punycode>
+ * Copyright 2011 Mathias Bynens <http://mathiasbynens.be/>
+ * Available under MIT license <http://mths.be/mit>
+ */
+
 ;(function(root) {
 
 	/**
@@ -29,7 +34,7 @@
 	delimiter = '-', // '\x2D'
 
 	/** Regular expressions */
-	regexNonASCII = /[^ -~]/, // unprintable ASCII chars + non-ASCII chars
+	regexNonASCII = /[^ -~]/, // matches unprintable ASCII chars + non-ASCII chars
 	regexPunycode = /^xn--/,
 
 	/** Error messages */
@@ -92,17 +97,14 @@
 	}
 
 	/**
-	 * Creates an array containing the decimal code points of each Unicode
-	 * character in the string. While JavaScript uses UCS-2 internally,
-	 * this function will convert a pair of surrogate halves (each of which
-	 * UCS-2 exposes as separate characters) into a single code point,
-	 * matching UTF-16.
-	 * @see `punycode.ucs2.encode`
-	 * @see <http://mathiasbynens.be/notes/javascript-encoding>
-	 * @memberOf punycode.ucs2
+	 * Creates an array containing the decimal code points of each character in
+	 * the string.
+	 * @see `punycode.utf16.encode`
+	 * @see <http://tools.ietf.org/html/rfc2781>
+	 * @memberOf punycode.utf16
 	 * @name decode
-	 * @param {String} string The Unicode input string (UCS-2).
-	 * @returns {Array} The new array of code points.
+	 * @param {String} string The Unicode input string.
+	 * @returns {Array} The new array.
 	 */
 	function utf16decode(string) {
 		var output = [],
@@ -131,7 +133,7 @@
 	 * @memberOf punycode.utf16
 	 * @name encode
 	 * @param {Array} codePoints The array of decimal code points.
-	 * @returns {String} The new Unicode string (UCS-2).
+	 * @returns {String} The new string.
 	 */
 	function utf16encode(array) {
 		return map(array, function(value) {
@@ -281,7 +283,7 @@
 				}
 
 				i += digit * w;
-				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+				t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
 
 				if (digit < t) {
 					break;
@@ -404,7 +406,7 @@
 				if (currentValue == n) {
 					// Represent delta as a generalized variable-length integer
 					for (q = delta, k = base; /* no condition */; k += base) {
-						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+						t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
 						if (q < t) {
 							break;
 						}
@@ -473,11 +475,10 @@
 		 * @memberOf punycode
 		 * @type String
 		 */
-		'version': '1.0.0',
+		'version': '0.2.1',
 		/**
 		 * An object of methods to convert from JavaScript's internal character
-		 * representation (UCS-2) to decimal Unicode code points, and back.
-		 * @see <http://mathiasbynens.be/notes/javascript-encoding>
+		 * representation to Unicode and back.
 		 * @memberOf punycode
 		 * @type Object
 		 */