old_contents: # Configuration file for jupyterhub.
  
  c = get_config()
  
  # use the sudo spawner
  c.JupyterHub.spawner_class = 'sudospawner.SudoSpawner'
  
new_contents: # Configuration file for jupyterhub.
  
  c = get_config()
  
  # use the sudo spawner
  c.JupyterHub.spawner_class = 'sudospawner.SudoSpawner'
  
  c.SudoSpawner.debug_mediator = True
  c.JupyterHub.log_level = 10
  
subject: add debug-logging to example