&emsp in template leads to error

[nseinlet]

adding the   in a template leads to

owl.js:1 Uncaught (in promise) i: Invalid XML in template.
The parser has produced the following error message:
This page contains the following errors:error on line 10 at column 21: Entity 'emsp' not defined
Below is a rendering of the page up to the first error.
The error might be located at xml line 10 column 20
      <span>🇬🇧&emsp;</span>
-------------------^
    ```
    

[sdegueldre]

This entity isn't defined in XML, you can use   instead. Not sure if we should support all HTML entities.