odoo17e-kedaikipas58/addons/sale_renting_sign/data/mail_templates.xml

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

  <template id="message_signature_link">
      <p>A document has been signed and a copy attached to this order:
        <t t-foreach="request" t-as="o">
            <a href="#" t-att-data-oe-model="o._name" t-att-data-oe-id="o.id"> <t t-esc="o.reference"/></a><span t-if="request.ids[-1:] != o.ids">, </span>
        </t>
      </p>
  </template>

</odoo>