vracoop_website_sale_cart_limit/views/template.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <template id="cart_lines" inherit_id="website_sale.cart_lines">
        <xpath expr="//td[hasclass('text-center','td-qty')]" position="replace">
            <t t-if="line.product_id.product_tmpl_id.is_coupon">
              <td class="text-center td-qty">
                <span class="js_quantity text-muted" t-att-data-line-id="line.id" t-att-data-product-id="line.product_id.id" t-esc="int(line.product_uom_qty)"/>
              </td>
            </t>
            <t t-else="">
                <td class="text-center td-qty">
                    <div t-if="not line.linked_line_id" class="css_quantity input-group mx-auto oe_website_spinner">
                        <div class="input-group-prepend">
                            <a t-attf-href="#" class="btn btn-link js_add_cart_json d-none d-md-inline-block" aria-label="Remove one" title="Remove one">
                                <i class="fa fa-minus"></i>
                            </a>
                        </div>
                        <input type="text" class="js_quantity form-control quantity" t-att-data-line-id="line.id" t-att-data-product-id="line.product_id.id" t-att-value="int(line.product_uom_qty) == line.product_uom_qty and int(line.product_uom_qty) or line.product_uom_qty" />
                        <div class="input-group-append">
                            <a t-attf-href="#" class="btn btn-link float_left js_add_cart_json d-none d-md-inline-block" aria-label="Add one" title="Add one">
                                <i class="fa fa-plus"></i>
                            </a>
                        </div>
                    </div>
                    <t t-if="line.linked_line_id">
                      <span class="js_quantity text-muted" t-att-data-line-id="line.id" t-att-data-product-id="line.product_id.id" t-esc="int(line.product_uom_qty)"/>
                    </t>
                </td>
            </t>
        </xpath>
    </template>

</odoo>