Updates according to reviews

Author: javiereguiluz

reference/configuration/framework.rst

@@ -2535,12 +2535,10 @@ Defines the Doctrine entities that will be introspected to add
             <framework:config>
                 <framework:validation>
                     <framework:auto-mapping>
-                        <framework:namespace>App\Entity\</framework:namespace>
-                        <framework:service/>
+                        <framework:service namespace="App\Entity\"/>
 
-                        <framework:namespace>Foo\</framework:namespace>
-                        <framework:service>Foo\Some\Entity</framework:service>
-                        <framework:service>Foo\Another\Entity</framework:service>
+                        <framework:service namespace="Foo\">Foo\Some\Entity</framework:service>
+                        <framework:service namespace="Foo\">Foo\Another\Entity</framework:service>
                     </framework:auto-mapping>
                 </framework:validation>
             </framework:config>
@@ -2555,8 +2553,8 @@ Defines the Doctrine entities that will be introspected to add
             $framework->validation()
                 ->autoMapping()
                     ->paths([
-                        'App\Entity\' => [],
-                        'Foo\' => ['Foo\Some\Entity', 'Foo\Another\Entity'],
+                        'App\\Entity\\' => [],
+                        'Foo\\' => ['Foo\\Some\\Entity', 'Foo\\Another\\Entity'],
                     ]);
         };