minor #15916 [2.3] Fix license headers (1ed)

This PR was merged into the 2.3 branch.

Discussion
----------

[2.3] Fix license headers

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
-------

f0dc014 Fix license headers

Author: stof

Tests/Iterator/RecursiveDirectoryIteratorTest.php

@@ -2,12 +2,12 @@
 
 /*
  * This file is part of the Symfony package.
-*
-* (c) Fabien Potencier <[email protected]>
-*
-* For the full copyright and license information, please view the LICENSE
-* file that was distributed with this source code.
-*/
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
 
 namespace Symfony\Component\Finder\Tests\Iterator;