Merge branch '4.4' into 5.2

* 4.4:
  [Contracts] Add missing `@return` annotations
  [FrameworkBundle] Fixed file operations in Sodium vault seal

Author: nicolas-grekas

Secrets/SodiumVault.php

@@ -90,7 +90,7 @@ public function seal(string $name, string $value): void
         $list = $this->list();
         $list[$name] = null;
         uksort($list, 'strnatcmp');
-        file_put_contents($this->pathPrefix.'list.php', sprintf("<?php\n\nreturn %s;\n", VarExporter::export($list), \LOCK_EX));
+        file_put_contents($this->pathPrefix.'list.php', sprintf("<?php\n\nreturn %s;\n", VarExporter::export($list)), \LOCK_EX);
 
         $this->lastMessage = sprintf('Secret "%s" encrypted in "%s"; you can commit it.', $name, $this->getPrettyPath(\dirname($this->pathPrefix).\DIRECTORY_SEPARATOR));
     }
@@ -142,7 +142,7 @@ public function remove(string $name): bool
 
         $list = $this->list();
         unset($list[$name]);
-        file_put_contents($this->pathPrefix.'list.php', sprintf("<?php\n\nreturn %s;\n", VarExporter::export($list), \LOCK_EX));
+        file_put_contents($this->pathPrefix.'list.php', sprintf("<?php\n\nreturn %s;\n", VarExporter::export($list)), \LOCK_EX);
 
         $this->lastMessage = sprintf('Secret "%s" removed from "%s".', $name, $this->getPrettyPath(\dirname($this->pathPrefix).\DIRECTORY_SEPARATOR));