Fix ClearML Mosaic callback to 'on_train_epoch_end' (#92)

ultralytics/yolo/v8/segment/train.py

@@ -214,8 +214,7 @@ class SegmentationTrainer(DetectionTrainer):
         return dict(zip(keys, loss_items)) if loss_items is not None else keys
 
     def progress_string(self):
-        return ('\n' + '%11s' * 8) % \
-               ('Epoch', 'GPU_mem', *self.loss_names, 'Instances', 'Size')
+        return ('\n' + '%11s' * 8) % ('Epoch', 'GPU_mem', *self.loss_names, 'Instances', 'Size')
 
     def plot_training_samples(self, batch, ni):
         images = batch["img"]