Fixed builtin show on string literals to not print quotes
Fixed builtin show on string literals to not print quotes

jjdekker/libminizinc,nathanielbaxter/libminizinc,tias/libminizinc,tias/libminizinc,nathanielbaxter/libminizinc,jjdekker/libminizinc,nathanielbaxter/libminizinc,nathanielbaxter/libminizinc,jjdekker/libminizinc,jjdekker/libminizinc