Comment fix (#3058)

test.py

@@ -188,8 +188,8 @@ def test(data,
 
                 # Per target class
                 for cls in torch.unique(tcls_tensor):
-                    ti = (cls == tcls_tensor).nonzero(as_tuple=False).view(-1)  # prediction indices
-                    pi = (cls == pred[:, 5]).nonzero(as_tuple=False).view(-1)  # target indices
+                    ti = (cls == tcls_tensor).nonzero(as_tuple=False).view(-1)  # target indices
+                    pi = (cls == pred[:, 5]).nonzero(as_tuple=False).view(-1)  # prediction indices
 
                     # Search for detections
                     if pi.shape[0]: