Some code in the html source ?

I am writing an article about your plugin at [ Link redacted and see this http://wordpressfoundation.org/trademark-policy/ for why. ]

and I am not convinced the plugin is kicking in.

I tested it on the university with a few websites of students and got great results. This is of course on totally different websites.

I find no code not in wp-config.php or .htaccess

Is this normal?

https://wordpress.org/plugins/mobile-cache/