How to set prevous-text and next-text attribute as HTML template in angular-ui bootstrap pagination directive

I'm going to use http://angular-ui.github.io/bootstrap/#pagination I need to set 'previous', 'next' indicators as html.

something like:

<pagination 
    previous-text="'<span class="glyphicon glyphicon-arrow-left"></span>'"
    next-text="'<span class="glyphicon glyphicon-arrow-right"></span>'"
>
</pagination>

Unfortunately it returns parsed html instead of icons.

Here is a plunker with what I want to achieve: http://plnkr.co/edit/q59XhTO0II1ZBz21Etj2?p=preview