Dinodex

with help from @jvanderz22 and @jillalynch
`super` goes up the chain of superclasses until it finds one that defines a method with the same name as the method being invoked. 

so in this case the method being executed is `format`. `super` goes up to `AfricanFormatter`'s superclass `Formatter`, sees that `Formatter#format` is defined, and calls it.