enclose dir_name value with quotes

The coloration will not work otherwise

Author: greg0ire

Resources/doc/index.rst

@@ -66,7 +66,7 @@ You can configure the path, namespace, table_name and name in your `config.yml`.
 
     # app/config/config.yml
     doctrine_migrations:
-        dir_name: %kernel.root_dir%/DoctrineMigrations
+        dir_name: "%kernel.root_dir%/DoctrineMigrations"
         namespace: Application\Migrations
         table_name: migration_versions
         name: Application Migrations