Odoo-Build/snippets/stock.report_delivery_document.format_title.xml

<data inherit_id="stock.report_delivery_document" priority="50">
    <xpath expr="//h2" position="replace">
        <h2>
            <span t-esc="'Lieferschein ' + o.name.replace('WH/OUT/', '')"/>
        </h2>
    </xpath>
</data>