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ultralytics/engine/validator.py

@@ -147,7 +147,9 @@ class BaseValidator:
                 elif self.args.task == "classify":
                     self.data = check_cls_dataset(self.args.data, split=self.args.split)
                 else:
-                    raise FileNotFoundError(emojis(f"Dataset '{self.args.data}' for task={self.args.task} not found ❌"))
+                    raise FileNotFoundError(
+                        emojis(f"Dataset '{self.args.data}' for task={self.args.task} not found ❌")
+                    )
 
             if self.device.type in {"cpu", "mps"}:
                 self.args.workers = 0  # faster CPU val as time dominated by inference, not dataloading