Normalizes deprecation notice messages.

Author: Hugo Hamon

Session/Flash/FlashBag.php

@@ -169,7 +169,7 @@ public function clear()
     /**
      * Returns an iterator for flashes.
      *
-     * @deprecated Will be removed in 3.0.
+     * @deprecated since version 2.4, to be removed in 3.0.
      *
      * @return \ArrayIterator An \ArrayIterator instance
      */

Session/Storage/Handler/LegacyPdoSessionHandler.php

@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\HttpFoundation\Session\Storage\Handler;
 
+trigger_error('The '.__NAMESPACE__.'\LegacyPdoSessionHandler class is deprecated since version 2.6 and will be removed in 3.0. Use the Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler class instead.', E_USER_DEPRECATED);
+
 /**
  * Session handler using a PDO connection to read and write data.
  *
@@ -77,8 +79,6 @@ public function __construct(\PDO $pdo, array $dbOptions = array())
             throw new \InvalidArgumentException(sprintf('"%s" requires PDO error mode attribute be set to throw Exceptions (i.e. $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION))', __CLASS__));
         }
 
-        trigger_error('"Symfony\Component\HttpFoundation\Session\Storage\Handler\LegacyPdoSessionHandler" is deprecated since version 2.6 and will be removed in 3.0. Use "Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler" instead.', E_USER_DEPRECATED);
-
         $this->pdo = $pdo;
         $dbOptions = array_merge(array(
             'db_id_col' => 'sess_id',