Rubywarrior Level 4（清理我的代码帮助）

我正在通过 Ruby 学习编程，并且我发现了来自 Railscasts 的 Ryan Bates 编写的很棒的 Rubywarrior。不幸的是，我陷入了我的代码抛出语法错误消息（意外的 $end）的困境。

我不是在寻求答案，我想自己解决这个问题，但如果有人能指出我的代码从哪里得到错误，那就太好了。谢谢！

class Player

  def initialize
    @maxhealth = 20
    @dying = 7
    @previoushealth = @maxhealth
    @health = warrior.health
    @warrior = warrior
  end

  def play_turn(warrior)
  # If there are no enemies, rest until health is 100%
    turn_start_check(warrior)
    actions(warrior)
    turn_end_check(warrior)
  end

  def actions(warrior)
    if @damaged_since_last_turn
      warrior.shoot!
    elsif
      @health < @maxhealth
        warrior.rest!
    else
      warrior.walk!
    end
  end

  def hurt?(warrior)
    warrior.health < 20
  end

  def healthy?(warrior)
    warrior.health = 20
  end

  def alone?(warrior)
    warrior.feel.empty?
  end

  def should_i_move?(warrior)
    if healthy? and alone?
      warrior.rest!
    else
      warrior.walk!
  end

  # Put code here for if health from previous turn is less than last term
  # If true don't rest and keep moving forward
  def turn_start_check(warrior)
    @damaged_since_last_turn = @previoushealth > warrior.health
  end

  def turn_end_check(warrior)
    @previoushealth = warrior.health
  end
end

我猜：

def should_i_move?(warrior)
  if healthy? and alone?
    warrior.rest!
  else
    warrior.walk!
  end  # <<MISSING THIS ONE
end