Tweak

Author: javiereguiluz

service_container/expression_language.rst

@@ -67,10 +67,9 @@ to another service: ``App\Mailer``. One way to do this is with an expression:
             $services->set(MailerConfiguration::class);
 
             $services->set(Mailer::class)
-                ->args([expr(sprintf('service(%s).getMailerMethod()', var_export(MailerConfiguration::class, true)))]);
+                ->args([expr("service('App\\Mail\\MailerConfiguration').getMailerMethod()")]);
         };
 
-
 To learn more about the expression language syntax, see :doc:`/components/expression_language/syntax`.
 
 In this context, you have access to 2 functions: