kars
I do understand what you're saying, what I meant was the template doesn't add this fixed class 'pull-left' to the full-text image of article, here is the code that render that div tag:
<?php $imgfloat = empty($images->float_fulltext) ? $params->get('float_fulltext') : $images->float_fulltext; ?>
<figure class="pull-<?php echo htmlspecialchars($imgfloat, ENT_COMPAT, 'UTF-8'); ?> item-image">
the class: left/right or null will be added depend on the settings as the screenshot I sent.
If you add 'left', then the class will be added as 'pull-left', the same with right/null.
So again, the class 'pull-left' is not fixed there in template, it's dynamic depending on the settings for images in Articles Options on your site.
I hope this makes sense.