potion_num_string 1193 core/compile.c       PN str = potion_num_string(P, PN_NIL, val); \
potion_num_string  456 core/number.c    potion_method(num_vt, "string", potion_num_string, 0);
potion_num_string  934 core/potion.h  PN potion_num_string(Potion *, PN, PN);