Fix placeholder in message about deleting carriage

message.xml

@@ -4,7 +4,7 @@ this repository contains the full copyright notices and license terms. -->
 <tryton>
     <data grouped="1">
         <record model="ir.message" id="msg_shipment_carriage_delete">
-            <field name="text">You cannot delete the carriage "%(carriage)".</field>
+            <field name="text">You cannot delete the carriage "%(carriage)s".</field>
         </record>
     </data>
 </tryton>