These license icons are used in LocalSettings.php files that are generated by
-the installer. Although public domain has been removed from the installer as
-an option, the image needs to remain here to support installations which refer
-to it in LocalSettings.php.
+the installer. Although "Public domain" has been removed from the installer as
+an option, the public-domain.png image needs to remain here to support older
+installations that refer to it in LocalSettings.php.