HTML passing not working

[agustindorado95]

I would like to pass some html into the notification, like <strong></strong> and <br />.
Although the "Passing in HTML" section of the official page specifically says this is a feature and offers a working demo, somehow I cannot make it work, it just show the tags as normal characters.
Actually, if I just change the customisable demo on the page, make "Bootstrap Notify" to be "<strong>Bootstrap Notify</strong>", the demo does not work properly either. I wonder what setting I am missing. Thanks in advance.