fix: lint

Author: pawelpaszki

demo-notebooks/guided-demos/train_with_checkpoints.py

@@ -2,6 +2,7 @@
 Ray Train Checkpointing Script for RHOAI
 Compatible with Ray Train v2 (no deprecated restore APIs)
 """
+
 import os
 import tempfile
 import torch
@@ -113,7 +114,9 @@ def train_func(config):
                 checkpoint=Checkpoint.from_directory(tmpdir),
             )
 
-        print(f"Epoch {epoch}/{epochs-1}: loss={avg_loss:.4f} [Checkpoint saved to S3]")
+        print(
+            f"Epoch {epoch}/{epochs - 1}: loss={avg_loss:.4f} [Checkpoint saved to S3]"
+        )
 
 
 if __name__ == "__main__":