diff -ru src/Symfony/Component/Filesystem/Filesystem.php src/Symfony/Component/Filesystem/Filesystem.php
--- src/Symfony/Component/Filesystem/Filesystem.php	2023-01-23 13:23:40.595444481 +0000
+++ src/Symfony/Component/Filesystem/Filesystem.php	2023-01-23 13:23:46.724672139 +0000
@@ -671,7 +671,6 @@
      * Appends content to an existing file.
      *
      * @param string|resource $content The content to append
-     * @param bool            $lock    Whether the file should be locked when writing to it
      *
      * @throws IOException If the file is not writable
      */