old_contents: from disco.bot import Bot, Plugin
  
  class SimplePlugin(Plugin):
  	@Plugin.command('ping')
  	def on_ping_command(self, event):
  		event.msg.reply('Pong!')
  
  	@Plugin.command('echo', '<content:str...>')
  	def on_echo_command(self, event, content):
  		event.msg.reply(content)
  
new_contents: from disco.bot import Bot, Plugin
  
  class SimplePlugin(Plugin):
      @Plugin.command('ping')
      def on_ping_command(self, event):
          event.msg.reply('Pong!')
  
      @Plugin.command('echo', '<content:str...>')
      def on_echo_command(self, event, content):
          event.msg.reply(content)
  
subject: Update testbot.py