Merge branch '3.4' into 4.3

* 3.4:
  Update Valid.rst

Author: xabbuh

reference/constraints/Valid.rst

@@ -155,7 +155,7 @@ stores an ``Address`` instance in the ``$address`` property::
             {
                 $metadata->addPropertyConstraint('street', new Assert\NotBlank());
                 $metadata->addPropertyConstraint('zipCode', new Assert\NotBlank());
-                $metadata->addPropertyConstraint('zipCode', new Assert\Length(["max" => 5]));
+                $metadata->addPropertyConstraint('zipCode', new Assert\Length(['max' => 5]));
             }
         }
 
@@ -170,7 +170,7 @@ stores an ``Address`` instance in the ``$address`` property::
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
                 $metadata->addPropertyConstraint('firstName', new Assert\NotBlank());
-                $metadata->addPropertyConstraint('firstName', new Assert\Length(["min" => 4]));
+                $metadata->addPropertyConstraint('firstName', new Assert\Length(['min' => 4]));
                 $metadata->addPropertyConstraint('lastName', new Assert\NotBlank());
             }
         }