update docstrings

Author: jopo666

histoprep/utils/_torch.py

@@ -28,7 +28,8 @@
 
 
 class SlideReaderDataset(Dataset):
-    """Torch dataset yielding tile images from reader (requires `PyTorch`)."""
+    """Torch dataset yielding tile images and `xywh`-coordinates from reader (requires
+    `PyTorch`)."""
 
     def __init__(
         self,
@@ -68,7 +69,8 @@ def __getitem__(self, index: int) -> tuple[Union[np.ndarray, Any], np.ndarray]:
 
 
 class TileImageDataset(Dataset):
-    """Torch dataset yielding tile images from paths (requires `PyTorch`)."""
+    """Torch dataset yielding tile images, image paths and optional labels (requires
+    `PyTorch`)."""
 
     def __init__(
         self,