ZF-10770 fixing broken docblock in Zend_Db_Table

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@23469 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Db/Table/Abstract.php

@@ -961,7 +961,7 @@ abstract class Zend_Db_Table_Abstract
      * You can elect to return only a part of this information by supplying its key name,
      * otherwise all information is returned as an array.
      *
-     * @param  $key The specific info part to return OPTIONAL
+     * @param  string $key The specific info part to return OPTIONAL
      * @return mixed
      */
     public function info($key = null)