Changed setting instruction

README.md

@@ -20,7 +20,7 @@ After that, you can issue `git pull` to update the code at anytime.
 
 Once the skin is in place add the following line to your `LocalSettings.php` file.
 
-    require_once($IP.'/skins/foreground/foreground.php');
+    require_once "$IP/skins/foreground/foreground.php";
 
 This will activate Foreground in your installation. At this point you can select it as a user skin in your user preferences.