About Formatting: Concise and dense code

formatting-attack.scala

case class Attack(from: Int3, to: Int3) extends Action {
  override def apply(gs: GameState): GameState = {
    Check.state(possible(gs))
    gs mapWorld { world =>
      (world.at(from), world.at(to)) match {
        case (turret @ Building(_, _, tag @ Turret(ammo)), target @ Building(_, _, _)) =>
          val damagedTarget = damage(target)
          val worldAfterShot =
            world.
              replace(from, turret.copy(tag = tag.copy(ammo = ammo - 1))).
              replace(to, damagedTarget)
          if (damagedTarget == Empty)
            Capture.repaintNeighboursIfDetached(worldAfterShot, to)
          else
            worldAfterShot
        case _ => throw new IllegalStateException()
      }
    }
  }

  ...
}