Merge branch '2.8' into 3.2

* 2.8:
  Misspelled word
  Display a better error design when the toolbar cannot be displayed
  do not validate empty values
  [Console] fix description of INF default values
  [PropertyAccess] Fix TypeError discard
  [Validator] Throw exception on Comparison constraints null options
  Identify tty tests in Component/Process
  [Security] Fix annotation

Author: fabpot

Authentication/Token/UsernamePasswordToken.php

@@ -27,7 +27,7 @@ class UsernamePasswordToken extends AbstractToken
      * Constructor.
      *
      * @param string|object            $user        The username (like a nickname, email address, etc.), or a UserInterface instance or an object implementing a __toString method
-     * @param string                   $credentials This usually is the password of the user
+     * @param mixed                    $credentials This usually is the password of the user
      * @param string                   $providerKey The provider key
      * @param (RoleInterface|string)[] $roles       An array of roles
      *

Validator/Constraints/UserPasswordValidator.php

@@ -39,6 +39,10 @@ public function validate($password, Constraint $constraint)
             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\UserPassword');
         }
 
+        if (null === $password || '' === $password) {
+            return;
+        }
+
         $user = $this->tokenStorage->getToken()->getUser();
 
         if (!$user instanceof UserInterface) {