fixed some deprecation messages

Author: fabpot

Extension/Core/Type/TimezoneType.php

@@ -95,7 +95,7 @@ public function getBlockPrefix()
      */
     public function loadChoiceList($value = null)
     {
-        @trigger_error(sprintf('Method "%s" is deprecated since version 3.4 and will be removed in 4.0.', __METHOD__), E_USER_DEPRECATED);
+        @trigger_error(sprintf('Method "%s" is deprecated since Symfony 3.4 and will be removed in 4.0.', __METHOD__), E_USER_DEPRECATED);
 
         if (null !== $this->choiceList) {
             return $this->choiceList;
@@ -111,7 +111,7 @@ public function loadChoiceList($value = null)
      */
     public function loadChoicesForValues(array $values, $value = null)
     {
-        @trigger_error(sprintf('Method "%s" is deprecated since version 3.4 and will be removed in 4.0.', __METHOD__), E_USER_DEPRECATED);
+        @trigger_error(sprintf('Method "%s" is deprecated since Symfony 3.4 and will be removed in 4.0.', __METHOD__), E_USER_DEPRECATED);
 
         // Optimize
         $values = array_filter($values);
@@ -134,7 +134,7 @@ public function loadChoicesForValues(array $values, $value = null)
      */
     public function loadValuesForChoices(array $choices, $value = null)
     {
-        @trigger_error(sprintf('Method "%s" is deprecated since version 3.4 and will be removed in 4.0.', __METHOD__), E_USER_DEPRECATED);
+        @trigger_error(sprintf('Method "%s" is deprecated since Symfony 3.4 and will be removed in 4.0.', __METHOD__), E_USER_DEPRECATED);
 
         // Optimize
         $choices = array_filter($choices);