old_contents: #!/usr/bin/env python
  #-*- coding: utf-8 -*-
  
  from __future__ import absolute_import, print_function, division
  
  from .phot_error import ErrorModel
  
new_contents: #!/usr/bin/env python
  #-*- coding: utf-8 -*-
  
  from __future__ import absolute_import, print_function, division
  
  
subject: Fix documentation build bug