Error string in file_unmanaged_copy() does not match its t() variables

In includes/file.inc @835 there is a token mismatch, either one of %directory or %destination should be corrected.

    $dirname = drupal_dirname($destination);
    if (!file_prepare_directory($dirname)) {
      // The destination is not valid.
      watchdog('file', 'File %file could not be copied, because the destination directory %directory is not configured correctly.', array('%file' => $original_source, '%destination' => drupal_realpath($dirname)));