Fix api docblocks for View layer classes.

lib/Cake/View/Helper/JsBaseEngineHelper.php

@@ -138,6 +138,7 @@ abstract class JsBaseEngineHelper extends AppHelper {
  *
  * @param mixed $val A PHP variable to be converted to JSON
  * @param boolean $quoteString If false, leaves string values unquoted
+ * @param string $key Key name.
  * @return string a JavaScript-safe/JSON representation of $val
  */
 	public function value($val = array(), $quoteString = null, $key = 'value') {