fixup! Use PHP attributes when creating custom validation constraints

Author: yoannrenard

validation/custom_constraint.rst

@@ -38,7 +38,7 @@ First you need to create a Constraint class and extend :class:`Symfony\\Componen
 
         use Symfony\Component\Validator\Constraint;
 
-        #[\Attribute()]
+        #[\Attribute]
         class ContainsAlphanumeric extends Constraint
         {
             public $message = 'The string "{{ string }}" contains an illegal character: it can only contain letters or numbers.';
@@ -157,8 +157,8 @@ You can use custom validators like the ones provided by Symfony itself:
         {
             // ...
 
-            #[Assert\NotBlank()]
-            #[AcmeAssert\ContainsAlphanumeric()]
+            #[Assert\NotBlank]
+            #[AcmeAssert\ContainsAlphanumeric]
             protected $name;
 
             // ...
@@ -279,7 +279,7 @@ not to the property:
 
     .. code-block:: php-attributes
 
-        #[AcmeAssert\ProtocolClass()]
+        #[AcmeAssert\ProtocolClass]
         class AcmeEntity
         {
             // ...