old_contents: from deriva.transfer import DerivaDownloadError, DerivaDownloadAuthorizationError, DerivaDownloadAuthenticationError, \
      DerivaDownloadConfigurationError
  
  
  class DerivaBackupError(DerivaDownloadError):
      pass
  
  
  class DerivaBackupConfigurationError(DerivaDownloadConfigurationError):
      pass
  
  
  class DerivaBackupAuthenticationError(DerivaDownloadAuthenticationError):
      pass
  
  
  class DerivaBackupAuthorizationError(DerivaDownloadAuthorizationError):
      pass
new_contents: from deriva.transfer import DerivaDownloadError, DerivaDownloadAuthorizationError, DerivaDownloadAuthenticationError, \
      DerivaDownloadConfigurationError
  
  
  class DerivaBackupError(DerivaDownloadError):
      pass
  
  
  class DerivaBackupConfigurationError(DerivaDownloadConfigurationError):
      pass
  
  
  class DerivaBackupAuthenticationError(DerivaDownloadAuthenticationError):
      pass
  
  
  class DerivaBackupAuthorizationError(DerivaDownloadAuthorizationError):
      pass
  
subject: Add newline at eof.