Merge branch '5.4' into 6.4

* 5.4:
  [PhpUnitBridge][VarDumper] fix color detection
  [CI] Make sure we preserve file->header when we run sync-translations.php
  Review validators.sl.xlf

Dumper/CliDumper.php

@@ -627,7 +627,7 @@ private function hasColorSupport(mixed $stream): bool
         // Detect msysgit/mingw and assume this is a tty because detection
         // does not work correctly, see https://github.com/composer/composer/issues/9690
         if (!@stream_isatty($stream) && !\in_array(strtoupper((string) getenv('MSYSTEM')), ['MINGW32', 'MINGW64'], true)) {
-            return true;
+            return false;
         }
 
         if ('\\' === \DIRECTORY_SEPARATOR && @sapi_windows_vt100_support($stream)) {