diff --git a/torchnlp/utils.py b/torchnlp/utils.py
index 339a9b2..a2446c0 100644
--- a/torchnlp/utils.py
+++ b/torchnlp/utils.py
@@ -100,7 +100,7 @@ def pad_batch(batch, padding_index=PADDING_INDEX, dim=0):
         batch (:class:`list` of :class:`torch.Tensor`): Batch of tensors to pad.
         padding_index (int, optional): Index to pad tensors with.
         dim (int, optional): Dimension on to which to concatenate the batch of tensors.
- 
+
     Returns
         torch.Tensor, list of int: Padded tensors and original lengths of tensors.
     """