Apply Ruff auto-fixes

Author: github-actions[bot]

benchmarks/bench_ping_pong_latency.py

@@ -10,7 +10,7 @@
 import triton
 import triton.language as tl
 import iris
-from iris._mpi_helpers import mpi_allgather 
+from iris._mpi_helpers import mpi_allgather
 from examples.common.utils import read_realtime
 
 
@@ -186,7 +186,6 @@ def save_results(latency_matrix: torch.Tensor, out: str | None) -> None:
         raise ValueError(f"Unsupported output file extension: {out}")
 
 
-
 def print_run_settings(
     args: dict,
     num_ranks: int,