Adding "pamphlet tourist" to the to_string function.

src/billy_objects.cpp

@@ -150,6 +150,8 @@ namespace character {
                             return cooking_pot;
                         case equipments::MedicKit:
                             return medic_kit;
+                        case equipments::PamphletTourist:
+                            return pamphlet_tourist;
                     }
                 },
                 [](const tools &arg) {