In Magento 2 (Luma child theme) when enabling multiple currencies you get a currency switcher dropdown in the frontend's header.
By default, it shows the currency code followed by the full name,
e.g. GBP - British Pound Sterling.
I want to keep GBP, USD etc.
But remove the rest as I think it's unnecessary, customers can tell the currency from the code.
I am new to Magento 2 and can't find where in the template or layout files this can be changed.