Replaced explicit exceptions with `with_return`
Replaced explicit exceptions with `with_return`

Bugfry/exercism,Bugfry/exercises,Bugfry/exercises,Bugfry/exercism,Bugfry/exercism,Bugfry/exercism,Bugfry/exercism,Bugfry/exercises,Bugfry/exercism,Bugfry/exercises,Bugfry/exercises,Bugfry/exercises