Merge branch '3.4' into 4.3

* 3.4:
  Update links to documentation
  [Validator] Add the missing translations for the Arabic (ar) locale
  ensure to expect no validation for the right reasons
  [PhpUnitBridge] Add test case for @expectedDeprecation annotation
  Update year in license files
  [Console][FormatterHelper] Use helper strlen statically and remove duplicated code
  Fix BC issue in phpDoc Reflection library
  [Translator] Performance improvement in MessageCatalogue and catalogue operations.

Author: nicolas-grekas

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2014-2019 Fabien Potencier
+Copyright (c) 2014-2020 Fabien Potencier
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Tests/ExpectedDeprecationAnnotationTest.php

@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\PhpUnit\Tests;
+
+use PHPUnit\Framework\TestCase;
+
+final class ExpectedDeprecationAnnotationTest extends TestCase
+{
+    /**
+     * Do not remove this test in the next major versions.
+     *
+     * @group legacy
+     *
+     * @expectedDeprecation foo
+     */
+    public function testOne()
+    {
+        @trigger_error('foo', E_USER_DEPRECATED);
+    }
+
+    /**
+     * Do not remove this test in the next major versions.
+     *
+     * @group legacy
+     *
+     * @expectedDeprecation foo
+     * @expectedDeprecation bar
+     */
+    public function testMany()
+    {
+        @trigger_error('foo', E_USER_DEPRECATED);
+        @trigger_error('bar', E_USER_DEPRECATED);
+    }
+}