[ZF-7011] Zend_Date:

 - added some API docs

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@16140 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Date.php

@@ -488,6 +488,13 @@ class Zend_Date extends Zend_Date_DateObject
         return $this->date($this->_toToken($part, $locale), $this->getUnixTimestamp(), false);
     }
 
+    /**
+     * Internal method to apply tokens
+     *
+     * @param string $part
+     * @param string $locale
+     * @return string
+     */
     private function _toToken($part, $locale) {
         // get format tokens
         $comment = false;