fix(note): fix on code block

Author: Guikingone

service_container/injection_types.rst

@@ -321,10 +321,10 @@ which allow the container to return the newly created service:
         // ...
         $container->register('app.newsletter_manager', NewsletterManager::class)
             ->addMethodCall('withMailer', [new Reference('mailer')], true);
-
+`
 .. note::
 
-    This type of injection require that you add a ``@return static` docblock in order
+    This type of injection require that you add a ``@return static`` docblock in order
     for the container to understand to be capable of registering the method.
 
 This approach is useful if you need to configure your service according to your needs, 
@@ -346,9 +346,9 @@ so, what are the advantages?
 
 The disadvantages are:
 
-* As the `@return static`` docblock is required by the container to
+* As the ``@return static`` docblock is required by the container to
   understand that the method return a cloned object, you can
   found that adding docblock for a single method isn't adapted.
 
-* As this approach force the container to create a new object 
+* As this approach force the container to create a new object
   once the method is called, you can found hard to debug and test your code.