To add tag to all the elements except to the element in the last

In tpl file we need to create <hr> tag along with class name
Example:

<div class="cart-lines-table-last">
<hr class="cart_desktop-hr">
</div>

In corresponding sass file

.cart-lines-table-last:last-of-type {  
    .cart_desktop-hr{
        display: none;