def CheckDoNotSubmitInDescription(input_api, output_api):
  """Checks that the user didn't add 'DO NOT ''SUBMIT' to the CL description.
  """
  keyword = 'DO NOT ''SUBMIT'
  if keyword in input_api.change.DescriptionText():
    return [output_api.PresubmitError(
        keyword + ' is present in the changelist description.')]
  else:
    return []