rails 3.0.9中的语法错误

Question

我正在尝试为我的应用构建一个评论系统，当我尝试为博客帖子创建评论时，我遇到了这个语法错误。

    blog/app/controllers/comments_controller.rb:86: syntax error, unexpected $end, expecting keyword_end
  end

这就是我对评论控制器的看法

def create
     @article = Article.find(params[:article_id])
    @comment = @article.comments.build(params[:comment])
    respond_to do |format|
      if @comment.save
        format.html { redirect_to(@article, :notice => 'Comment was successfully created.') }
        format.xml  { render :xml => @article, :status => :created, :location => @article }
      else
        format.html { redirect_to(@article, :notice => 
        'Comment could not be saved. Please fill in all fields')}
        format.xml  { render :xml => @comment.errors, :status => :unprocessable_entity }
      end
    end
  end

我试图删除一个结尾，但这没有帮助。

我正在运行rails 3.0.9和ruby 1.9.2