fixed the issue changing HTML/CSS
HTML:
<a data-toggle="collapse" href="#doc" class="yt-toggle collapsed">View Doc <i class="fa fa-caret-right fa-fw"></i> <i class="fa fa-caret-down fa-fw"></i></a>CSS:
.yt-toggle.collapsed .fa-caret-down { display: none;}.yt-toggle.collapsed .fa-caret-right { display: inline-block;}.yt-toggle .fa-caret-right { display: none;}