fix lint on main (#19052)

python/sglang/srt/debug_utils/dumper.py

@@ -805,6 +805,7 @@ class _RpcBroadcastBase:
     def __init__(self, handles: List[_ZmqRpcHandle]):
         self._handles = handles
 
+
 class _LocalOnlyBroadcast(_RpcBroadcastBase):
     """Calls methods directly on the local dumper, wrapping the result in a list."""