old_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  import sys
  
  if sys.version_info < (3, 5):
      import warnings
      warnings.warn(
          'Next version of WDOM will not support python 3.4. Please update to version 3.6+.'  # noqa: E501
      )
  
subject: Raise warning when python version is < 3.5