old_contents: # coding: utf-8
  
  """
  Created on 2016-08-23
  @author: naoey
  """
  
  class SlashBotError(Exception):
      pass
  
  
  class ConfigError(SlashBotError):
      def __init__(self, config_attr=None):
          if config_attr:
              super().init("Missing/invalid config for {}".format(config_attr))
          else:
              super().init()
  
  
  class SlashBotValueError(SlashBotError):
      pass
  
  
  class CommandFormatError(SlashBotError):
      pass
  
  
  class ThirdPartyAPIError(SlashBotError):
      pass
  
  
  class AssetsError(SlashBotError):
      pass
  
  
  class CommandDefinitionError(SlashBotError):
      pass
  
  
  class BotPermissionError(SlashBotError):
      pass
  
new_contents: # coding: utf-8
  
  """
  Created on 2016-08-23
  @author: naoey
  """
  
  
  class SlashBotError(Exception):
      pass
  
  
  class ConfigError(SlashBotError):
      def __init__(self, config_attr=None):
          if config_attr:
              super().init("Missing/invalid config for {}".format(config_attr))
          else:
              super().init()
  
  
  class SlashBotValueError(SlashBotError):
      pass
  
  
  class CommandFormatError(SlashBotError):
      pass
  
  
  class ThirdPartyAPIError(SlashBotError):
      pass
  
  
  class AssetsError(SlashBotError):
      pass
  
  
  class CommandDefinitionError(SlashBotError):
      pass
  
  
  class BotPermissionError(SlashBotError):
      pass
  
subject: Add missing newline for PEP8.