Added a triling slash

Author: javiereguiluz

translation.rst

@@ -360,7 +360,7 @@ Translation Resource/File Names and Locations
 
 Symfony looks for message files (i.e. translations) in the following default locations:
 
-* the ``translations`` directory (at the root of the project);
+* the ``translations/`` directory (at the root of the project);
 
 * the ``app/Resources/translations`` directory;