old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from __future__ import absolute_import, division, print_function, unicode_literals
  
  import sys
  
  import pytest
  
  
  def main():
      sys.path.insert(0, "test")
      return pytest.main()
  
  
  if __name__ == "__main__":
      sys.exit(main())
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  import sys
  
  import pytest
  
  
  def main():
      sys.path.insert(0, "test")
      return pytest.main()
  
  
  if __name__ == "__main__":
      sys.exit(main())
  
subject: Update runtests.py