old_contents: from redash.models import db, Alert, AlertSubscription
  
  if __name__ == '__main__':
      with db.database.transaction():
         Alert.create_table()
         AlertSubscription.create_table()
  
      db.close_db(None)
  
new_contents: from redash.models import db, Alert, AlertSubscription
  
  if __name__ == '__main__':
      with db.database.transaction():
          Alert.create_table()
          AlertSubscription.create_table()
  
      db.close_db(None)
  
subject: Make lines indented by four spaces instead of three