Merge branch '5.3' into 5.4

* 5.3:
  Update translation.rst

Author: javiereguiluz

translation.rst

@@ -297,6 +297,22 @@ To manage these situations, Symfony follows the `ICU MessageFormat`_ syntax by
 using PHP's :phpclass:`MessageFormatter` class. Read more about this in
 :doc:`/translation/message_format`.
 
+.. tip::
+
+    If you don't use the ICU MessageFormat syntax in your translation files,
+    pass a parameter named "%count%" to select the best plural form of the message:
+
+    .. code-block:: twig
+
+       {{ message|trans({'%name%': '...', '%count%' => 1}, 'app') }}
+
+    The ``message`` variable must include all the different versions of this
+    message based on the value of the ``count`` parameter. For example:
+
+    .. code-block:: text
+
+        {0}%name% has no apples|{1}%name% has one apple|]1,Inf[ %name% has %count% apples
+
 .. _translatable-objects:
 
 Translatable Objects