We often use 'ex-info' to throw a custom exception.But ex-info at least accepts two arguments: a string message and a data map.
In most cases，but we don't need to throw a exception that taken a data map.
So i think we can add a new arity to ex-info:
(ex-info "the exception message")
That created a ExceptionInfo instance carries empty data.
I am not sure it's useful for other people,but it's really useful for our developers.
The patch is attached.