no you cant. Take a look. Its not HTML. the email appears no where in the HTML,JS, or CSS. Its a hack that dynamically changes the pseudo selectors and combining the before and after to make a complete word.
A can scrape "appendStyle("username", "gmail.com")" just as easy as I can scrape "username at gmail dot com".
I think your missing the point. The text is going to be encrypted in and then decrypted in the external JS. The append style parameters are just to show that nothing is in the html/js besides that.