[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

src/lightning/fabric/strategies/launchers/subprocess_script.py

@@ -160,7 +160,7 @@ def _hydra_subprocess_cmd(local_rank: int) -> Tuple[Sequence[str], str]:
 
     if hydra_cfg.output_subdir is None:  # config isn't saved, so re-run original command
         if hydra_cfg.mode == RunMode.MULTIRUN:
-            raise RuntimeError(f"DDP with multirun requires either re-run callback or saved config file")
+            raise RuntimeError("DDP with multirun requires either re-run callback or saved config file")
         command += sys.argv[1:] + [f"hydra.run.dir={hydra_output}"]  # Keep output directory same
     else:
         hydra_subdir = hydra_output / hydra_cfg.output_subdir