old_contents: from plugin import CommandPlugin, PluginException
  
  
  class Echo(CommandPlugin):
      """
      Basic Echo command
      """
  
      def __init__(self):
          CommandPlugin.__init__(self)
          self.triggers = ['echo']
          self.short_help = 'Repeat after me'
          self.help = 'Echos back whatever was said'
          self.help_example = ['!echo test']
  
      def on_command(self, bot, event, response):
          args = event['text']
          if args:
              response['text'] = args
              bot.sc.api_call('chat.postMessage', **response)
          else:
              raise PluginException('Missing arguments. E.g. `!help <text>`')
  
new_contents: from plugin import CommandPlugin, PluginException
  
  
  class Echo(CommandPlugin):
      """
      Basic Echo command
      """
  
      def __init__(self):
          CommandPlugin.__init__(self)
          self.triggers = ['echo']
          self.short_help = 'Repeat after me'
          self.help = 'Echos back whatever was said'
          self.help_example = ['!echo test']
  
      def on_command(self, bot, event, response):
          args = event['text']
          if args:
              response['text'] = args
              bot.sc.api_call('chat.postMessage', **response)
          else:
              raise PluginException('Missing arguments. E.g. `!echo <text>`')
  
subject: Fix typo in echo.py