error in docs for DrupalKernel::findSitePath()

API page: https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21DrupalKer...

> If a file named sites.php is present in the sites directory, it will be loaded prior to scanning for directories.

This used to be the case on 7.x, but that's wrong now.

    // Determine whether multi-site functionality is enabled.
    if (!file_exists($app_root . '/sites/sites.php')) {
      return 'sites/default';
    }

If a file named sites.php is NOT present, then directories are not scanned for at all!