format fix

Signed-off-by: rajveerb <[email protected]>

vllm/sequence.py

@@ -780,7 +780,7 @@ def get_last_token_latency(self) -> float:
                 "seq_group.get_last_token_latency() should not be called "
                 "if the seq_group is in prefill phase.")
         return self.last_token_latency
-    
+
     def maybe_set_first_token_time(self, time: float) -> None:
         """Sets the first token time for Request level timings."""
         # Note: in a case where a sequence_group is swapped and