Fix codeblock;

guides/Getting_Started_(Quest).md

@@ -51,7 +51,9 @@ Tips
 
 - It is possible to restart the app from the command line by running:
 
-    adb shell am start -S org.lovr.app/org.lovr.app.Activity
+<pre><code>
+adb shell am start -S org.lovr.app/org.lovr.app.Activity
+</code></pre>
 
 - If you need to use `print` in Lua for debug messages, you can see those in a terminal by running
   `adb logcat -s LOVR`.