Fix formatting when port is a tuple
@@ -1051,7 +1051,7 @@ class Scheduler(ServerNode):
service.listen((listen_ip, port))
self.services[k] = service
except Exception as e:
- warnings.warn("\nCould not launch service '%s' on port %d. " % (k, port) +
+ warnings.warn("\nCould not launch service '%s' on port %s. " % (k, port) +
"Got the following message:\n\n" + str(e),
stacklevel=3)
