Im try to modify PosTicket and I have this code:
mymodule/static/src/xml/pos.xml:
<?xml version="1.0" encoding="UTF-8"?>
<templates id="template"  xml:space="preserve">
    <t t-extend="PosTicket">
        <t t-jquery=".pos-sale-ticket" t-operation="append">
           <span>hola</span>
        </t>
    </t>
</templates>
mymodule/__manifest__.py
{
    'name': "mymodule",
    'summary': """ Modify PosTicket""",
    'author': "Me",
    'website': "http://www.myweb.do",
    'category': 'Tool',
    'version': '0.1',
    'depends': ['base','point_of_sale'],
    'qweb': [
        'static/src/xml/pos.xml',
    ],
}
But when I print the ticket, I dont see the changes
If someone can show if I jumped an step or something that I dont see, please help
PD: I'm workin in odoo 11
