old_contents: import unittest
  loader = unittest.TestLoader()
  start_dir = '.'
  suite = loader.discover(start_dir)
  
  runner = unittest.TextTestRunner()
  runner.run(suite)
new_contents: import unittest
  loader = unittest.TestLoader()
  start_dir = '.'
  suite = loader.discover(start_dir)
  
  runner = unittest.TextTestRunner()
  runner.run(suite)
  
subject: add newline