old_contents: """ Run pyhow. """
  
  import argparse
  
  from pyhow import make_samples, show_sample
  
  
  DESCRIPTION_PREFIX = "Select one of the following samples:"
  
  
  def run():
      """ Parse command line and show the required sample. """
  
      samples = make_samples()
      space = max(len(name) for name in samples)
  
      description = DESCRIPTION_PREFIX + ''.join([
          "\n  {:<{}}: {}".format(name, space, module.__doc__.strip().lower())
          for name, module in sorted(samples.items(), key=lambda item: item[0])
      ])
  
      parser = argparse.ArgumentParser(
          prog='pyhow', description=description,
          formatter_class=argparse.RawDescriptionHelpFormatter)
      parser.add_argument('sample_name', choices=sorted(samples.keys()))
      args = parser.parse_args()
  
      show_sample(samples[args.sample_name])
  
  
  if __name__ == '__main__':
      run()
  
  
new_contents: """ Run pyhow. """
  
  import argparse
  
  from pyhow import make_samples, show_sample
  
  
  DESCRIPTION_PREFIX = "Select one of the following samples:"
  
  
  def run():
      """ Parse command line and show the required sample. """
  
      samples = make_samples()
      space = max(len(name) for name in samples)
  
      description = DESCRIPTION_PREFIX + ''.join([
          "\n  {:<{}}: {}".format(name, space, module.__doc__.strip().lower())
          for name, module in sorted(samples.items(), key=lambda item: item[0])
      ])
  
      parser = argparse.ArgumentParser(
          prog='pyhow', description=description,
          formatter_class=argparse.RawDescriptionHelpFormatter)
      parser.add_argument('sample_name', choices=sorted(samples.keys()))
      args = parser.parse_args()
  
      show_sample(samples[args.sample_name])
  
  
  if __name__ == '__main__':
      run()
  
subject: Remove uneeded line