new_contents: import subprocess
  from distutils.spawn import find_executable
  
  DMUTINF = find_executable('dmutinf')
  DTENT = find_executable('dtent')
  
  
  def test_dmutinf():
      subprocess.check_call([DMUTINF, '-h'])
  
  
  def test_dtent():
      subprocess.check_call([DTENT, '-h'])
  
subject: add tests