ultralytics 8.0.80 single-line docstring fixes (#2060)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

ultralytics/yolo/v8/segment/val.py

@@ -52,7 +52,7 @@ class SegmentationValidator(DetectionValidator):
         return p, proto
 
     def update_metrics(self, preds, batch):
-        # Metrics
+        """Metrics."""
         for si, (pred, proto) in enumerate(zip(preds[0], preds[1])):
             idx = batch['batch_idx'] == si
             cls = batch['cls'][idx]
@@ -179,7 +179,7 @@ class SegmentationValidator(DetectionValidator):
         self.plot_masks.clear()
 
     def pred_to_json(self, predn, filename, pred_masks):
-        # Save one JSON result
+        """Save one JSON result."""
         # Example result = {"image_id": 42, "category_id": 18, "bbox": [258.15, 41.29, 348.26, 243.78], "score": 0.236}
         from pycocotools.mask import encode  # noqa