You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: buzz_controller.rb
    path of file: ./repos/bootcamp/app/controllers
    
    the code of the file until where you have to start completion: # frozen_string_
    
  def edit; end

  def update
    if @buzz.update(buzz_params)
      redirect_to buzz_path, notice: '紹介・言及記事を更新しました'
    else
      render :edit
    end
  end