old_contents: def bot_says(channel, text, slack_client):
      return slack_client.api_call("chat.postMessage",
                                   channel=channel,
                                   text=text,
                                   as_user=True)
  
  
  def compose_explanation(url):
      return "If you would like {} to be stored please react to it with a :+1:".format(url)
  
  
  def ask_confirmation(message, slack_client):
      bot_says(message['channel'],
               compose_explanation(message['url']),
               slack_client)
  
new_contents: def bot_says(channel, text, slack_client):
      return slack_client.api_call("chat.postMessage",
                                   channel=channel,
                                   text=text,
                                   as_user=True)
  
  
  def compose_explanation(url):
      return "If you would like {} to be stored please react to it with a :+1:, \
              if you would like it to be disregarded use :-1:".format(url)
  
  
  def ask_confirmation(message, slack_client):
      bot_says(message['channel'],
               compose_explanation(message['url']),
               slack_client)
  
subject: Change notification