new_contents: #!/usr/bin/env python
  
  import asyncio
  import datetime
  import random
  import websockets
  
  CONNECTIONS = set()
  
  async def register(websocket):
      CONNECTIONS.add(websocket)
      try:
          await websocket.wait_closed()
      finally:
          CONNECTIONS.remove(websocket)
  
  async def show_time():
      while True:
          message = datetime.datetime.utcnow().isoformat() + "Z"
          websockets.broadcast(CONNECTIONS, message)
          await asyncio.sleep(random.random() * 2 + 1)
  
  async def main():
      async with websockets.serve(register, "localhost", 5678):
          await show_time()
  
  if __name__ == "__main__":
      asyncio.run(main())
  
subject: Add file forgotten in 731ad8c.