diff -ru src/Symfony/Component/Filesystem/Filesystem.php src/Symfony/Component/Filesystem/Filesystem.php
--- src/Symfony/Component/Filesystem/Filesystem.php	2023-06-05 09:41:51.043426810 +0000
+++ src/Symfony/Component/Filesystem/Filesystem.php	2023-06-05 09:41:57.620815726 +0000
@@ -701,7 +701,6 @@
      * 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
      *
      * @return void
      *