diff --git a/icefall/.utils.py.swp b/icefall/.utils.py.swp
index 4d362b1df..b8aeeea90 100644
Binary files a/icefall/.utils.py.swp and b/icefall/.utils.py.swp differ
diff --git a/icefall/utils.py b/icefall/utils.py
index 04482b8af..c9dec476c 100644
--- a/icefall/utils.py
+++ b/icefall/utils.py
@@ -200,6 +200,7 @@ def encode_supervisions(
         for supervision in supervisions['cut']:
             try: num_frames.append(supervision.tracks[0].cut.recording.num_samples)
             except: num_frames.append(supervision.recording.num_samples)
+
     supervision_segments = torch.stack(
         (
             supervisions["sequence_idx"],