Avoid double naming of device tracker

[fredriklj]

It appears HA names the device tracker using device-name + attr_name. Setting attr_name to the vehicle.model_name, where no nick name has been assigned, means naming it twice with the same string:

Porsche Model Porsche Model

[CJNE]

Perhaps instead of removing the name altoghether, check if attr_name is set?

if vehicle.model_name:
        self._attr_name = vehicle.model_name

[fredriklj]

I believe vehicle.model_name always returns a string, and should return "modelName" (under all circumstances) which is part of what we call the base data. And "modelName" is the exact same string we set as device name, being inherited by the device tracker as well.

In your setup, what is the device tracker's name when self._attr_name is set to vehicle.model_name?

[fredriklj]

After having a closer look at it, I think the only situation where the device tracker would not be assigned the same string twice is when customName is set.

So checking if this is set and assigning an empty string if it is not should do it. Let's try this for now, to get the release out.