How to edit the shortcode [mp_list_products]

Need to know where can I find the source of _ that is appearing under "mp_product_content"...the area marked in Screenshot-1 and Screenshot-2.....

I require this to edit/remove description excerpt, bring title down etc.....the contents (image, title, description, price) that this shortcode is fetching....like I did some corrections in here http://moretique.com/store/ ... for this minor tweaking I did the changes here /public_html/wp-content/themes/framemarket/library/functions/marketpress.php

I need to know where else in the coding can I find the mentioning of "product_excerpt" the shortcode "mp_product_content" definitely is not fetching from here (marketpress.php) $product_content .= $mp->product_excerpt($post->post_excerpt, $post->post_content, $post->ID); (see Screenshot-3) I've checked/tested it

Thanks