"2) Regardless the number of players, add always the gold digger with the red jacket to the cards which have to be distributed ."
3players game(saboteur 1, dwarf 3)
→ A. saboteur 1, dwarf 3 + red jacket dwarf 1
→ B. saboteur 1, dwarf 2 + red jacket dwarf 1
I'm thinking it means B. It means the red jacket dwarf is always included as one of the dwarves.