chore: heredoc indentation as of PHP 7.3

https://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.heredoc

Author: keradus

Resources/WcswidthDataGenerator.php

@@ -80,24 +80,24 @@ private function getHeader(string $version): string
         $date = (new \DateTimeImmutable())->format('c');
 
         return <<<EOT
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <[email protected]>
- *
- * This file has been auto-generated by the Symfony String Component for internal use.
- *
- * Unicode version: $version
- * Date: $date
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-
-EOT;
+            <?php
+
+            /*
+             * This file is part of the Symfony package.
+             *
+             * (c) Fabien Potencier <[email protected]>
+             *
+             * This file has been auto-generated by the Symfony String Component for internal use.
+             *
+             * Unicode version: $version
+             * Date: $date
+             *
+             * For the full copyright and license information, please view the LICENSE
+             * file that was distributed with this source code.
+             */
+
+
+            EOT;
     }
 
     private function format(array $rawData): array