OK, you are right. I had to update. BUT, now, look at this.
In my file /home/odoo-test/odoo-test/addons/point_of_sale/views/templates.xml :
<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>
<template id="index" name="POS Index - Original"><!DOCTYPE html>
<html>
<head>
<title>Odoo POSzxxx</title>
<meta http-equiv="X-UA-Compatibleasdasd" content="IE=edge,chrome=1"/>
THE TITLE TAG IS ALWAYS UNCHANGED WHEN I INSPECT THE CODE!! I search about this title since many days...
Look image
http://lapagept.com/images/odoo/adfa.png
UPDATE #1
If I define point_of_sale.index in my custom module, it works...
<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>
<template id="point_of_sale.index" name="POS Index - Original"><!DOCTYPE html>
<html>
<head>
<title>Odoo POSzxxx</title>
<meta http-equiv="X-UA-Compatibleasdasd" content="IE=edge,chrome=1"/>
http://lapagept.com/images/odoo/wwwwe.png
UPDATE #2
It's true! with this, it works.
https://github.com/odoo/odoo/commit/082a6ce0abaf772bfff22643402b250bdd271f5d
UPDATE #3
I'm still in the same problem (like one of my previous post https://www.odoo.com/forum/help-1/question/how-to-replace-a-title-with-xpath-81796). Here is the code from my custom module. the first xpath NEVER works. The second xpath ALWAYS works.
<template id="point_of_sale.index_as" inherit_id='point_of_sale.index' name="Index - AS">
<xpath expr="//title" position="replace">
<title>Odoo POS - AS</title>
</xpath>
<xpath expr="//link[@id='pos-stylesheet']" position="after">
<link rel="stylesheet" href="/pos_lapagept/static/src/css/pos_as.css" />
</xpath>
</template>