Renamed set? to generic-set? and set-immutable? to set? in tests.
Renamed set? to generic-set? and set-immutable? to set? in tests.

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket