Docs: Improve inline comments per the documentation standards.

Includes minor code layout fixes for better readability.

See #48303.

git-svn-id: https://develop.svn.wordpress.org/trunk@47122 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/options-permalink.php

@@ -419,7 +419,7 @@ else :
 </form>
 	<?php endif; ?>
 <?php endif; ?>
-<?php } // multisite ?>
+<?php } // End if ! is_multisite(). ?>
 
 </div>