old_contents: #!/usr/bin/env python
  from migrate.versioning.shell import main
  
  if __name__ == '__main__':
      main(repository='database_migrate', debug='False', url=os.environ['DATABASE_URL']) 
  
new_contents: #!/usr/bin/env python
  from migrate.versioning.shell import main
  import os
  
  if __name__ == '__main__':
      main(repository='database_migrate', debug='False', url=os.environ['DATABASE_URL']) 
  
subject: Fix import os