Merge branch '5.4' into 6.4

* 5.4:
  minor #58472 CS: clean some whitespaces/indentation (keradus)
  Fix newline
  harden test to not depend on the system's configured default timezone
  [Form] Support intl.use_exceptions/error_level in NumberToLocalizedStringTransformer
  [ExpressionLanguage] Add missing test case for `Lexer`
  [FrameworkBundle] Fix passing request_stack to session.listener
  ensure session storages are opened in tests before destroying them
  [HttpKernel] Correctly merge `max-age`/`s-maxage` and `Expires` headers
  [Security][Validator] Check translations for Czech
  [Security] Fix serialized object representation in tests
  [DoctrineBridge] Fix risky test warnings

Author: xabbuh

Loader/XmlFileLoader.php

@@ -483,7 +483,7 @@ private function parseFileToDOM(string $file): \DOMDocument
                 }
             }
             if ($errors) {
-                throw new InvalidArgumentException(sprintf('Unable to parse file "%s": ', $file).implode("/n", $errors), $e->getCode(), $e);
+                throw new InvalidArgumentException(sprintf('Unable to parse file "%s": ', $file).implode("\n", $errors), $e->getCode(), $e);
             }
         }