Update DecodeRooms.py to decode boundaries.
setup_room: memcpy which was LDIR was not updating DE post call.
Update room_defs with boundaries.
Replace constant with symbol.
music_channel<N>_ptr -> music_channel<N>_index.
Key prompts had their full stops missing.
Confirm prompts had its full stop missing.
Move more_messages one byte further forward.
input_device_select_keyscan: Disambiguate use of carry flag (call it ‘carry’ not ‘C’).
Fix broken divider.
mark_nearby_items: Correct documented ranges.

‘goto next’ rather than ‘goto continue’ to avoid using a reserved keyword.
Replace constants with symbols.