double arrows

You have 3 optons:
1. use tag=”div” in your shortcode
2. set up div as the default tag attribute in the plugin settings.
3. if you need to use span, then you also need to define a trigclass such as: trigclass=”span_fix” and then define the :before and :after pseudo attributes as follows:

.span_fix:before, .span_fix:after {
     content:  none;
}

Any one of those three should fix the issue for you. Let us know which one you used and if it resolved your issue.