Misprints in enemy.set_invincible Lua API
Misprints here: http://www.solarus-games.org/doc/1.6/lua_api_enemy.html#lua_api_enemy_set_invincible in both "enemy:set_invincible()" and "enemy:set_invincible_sprite(sprite)", where it says: lua_api_enemy_set_attack_consequence(attack, "ignored") and lua_api_enemy_set_attack_consequence_sprite(sprite, attack, "ignored")