old_contents: import formats
  import cancluster
  import convert
  import copy
  from canmatrix import *
  
new_contents: #!/usr/bin/env python
  from __future__ import absolute_import
  
  import canmatrix.formats as formats
  import canmatrix.cancluster as cancluster
  import canmatrix.convert as convert
  import canmatrix.copy as copy
  from canmatrix import *
  
subject: make test runable again