I have a question about the source model "Country".
Currently, I can use, in my system.xml file, the following source_model :
In my Stores > Configuration, I can see my dropdown with the list of all countries.
But when I see the code, I can see my select option have only two digits as value, example :
But I would like 3 digits, example :
Do you know how can I change that ? Did I need change the source model, or may be it's an option somewhere ?