fixed:

1. potions being walked over
2. spawning on stairs
3. enemies walking under players
4. merchants not being aggresive
5. potions losing effect when sending pass signal (cleared by player::start_turn())’

src/arguments.cc

@@ -175,7 +175,7 @@ void print_args_list() {
 -R        : Enable revisiting levels\n\
 -e        : Enable extra potions and races\n\
 -E        : Enable extra levels\n\
--o        : Allows monsters to go over gold and potions\n\
+-o        : Allows characters to go over gold and potions\n\
 -s [seed] : Sets initial seed to seed\n\
 -I [file] : Reads commands from file. CANNOT BE USED WITH -n.\n\
 -O [file] : Outputs to file. CANNOT BE USED WITH -n.\n\