Remove BC layers related to new methods and new parameters

Author: nicolas-grekas

CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+7.0
+---
+
+ * Add argument `$lock` to `Filesystem::appendToFile()`
+
 5.4
 ---
 

Filesystem.php

@@ -703,7 +703,7 @@ public function dumpFile(string $filename, $content)
      *
      * @throws IOException If the file is not writable
      */
-    public function appendToFile(string $filename, $content/* , bool $lock = false */)
+    public function appendToFile(string $filename, $content, bool $lock = false)
     {
         if (\is_array($content)) {
             throw new \TypeError(sprintf('Argument 2 passed to "%s()" must be string or resource, array given.', __METHOD__));
@@ -715,8 +715,6 @@ public function appendToFile(string $filename, $content/* , bool $lock = false *
             $this->mkdir($dir);
         }
 
-        $lock = \func_num_args() > 2 && func_get_arg(2);
-
         if (false === self::box('file_put_contents', $filename, $content, \FILE_APPEND | ($lock ? \LOCK_EX : 0))) {
             throw new IOException(sprintf('Failed to write file "%s": ', $filename).self::$lastError, 0, null, $filename);
         }