no classprefix in preview html element?

[packjs]

<style>
.pa {
	line-height: 1;
}

.pa:before {
	font-family: blitrip !important;
	font-style: normal;
	font-weight: normal !important;
	vertical-align: top;
}
.pa-caret-right:before {
	content: "\f110";
}
</style>

	<div class="preview">
		<span class="preview__icon">
			<span class=" pa-caret-right"></span>
		</span>
		<span>caret-right</span>
	</div>

I want to <span class="pa pa-caret-right"></span>, this is right, but have no 'pa' in class.