There is no support in ei_x_format(*) to work with map term. Map was introduced in erlang decade ago and there is still no support. ei_x_format(&buf, "#{a=>1}") returns -1
Is it some decision about this or just no one use it at all?
I have my own implementation, but I don’t understand, how to run test suite for erl_interface_test to create good PR in github.