Update Lib/asyncio/base_events.py

Co-authored-by: Peter Bierma <zintensitydev@gmail.com>

Author: ordinary-jamie

Lib/asyncio/base_events.py

@@ -344,7 +344,7 @@ def _start_serving(self):
         elif self._state == _ServerState.SERVING:
             return
         else:
-            raise RuntimeError(f'server {self!r} is closed')
+            raise RuntimeError(f'server {self!r} was already started and then closed')
 
         for sock in self._sockets:
             sock.listen(self._backlog)