old_contents: 
  if __name__ == '__main__':
      import doctest
      from lesion import trace
      doctest.testmod(trace)
  
  
new_contents: 
  if __name__ == '__main__':
      import doctest
      from lesion import lifio, stats, trace
      map(doctest.testmod, [lifio, stats, trace])
  
  
subject: Add new modules to doctests