Fix dataset docs parsing issue with extra spaces (#2607)

Summary: Pull Request resolved: https://github.com/pytorch/audio/pull/2607

Reviewed By: carolineechen, nateanl

Differential Revision: D38522606

Pulled By: skim0514

fbshipit-source-id: 2c38b8dcb343bcf624bfda1bfa2afd91abf2e668

torchaudio/datasets/librilight_limited.py

@@ -79,6 +79,7 @@ class LibriLightLimited(Dataset):
 
     def __getitem__(self, n: int) -> Tuple[Tensor, int, str, int, int, int]:
         """Load the n-th sample from the dataset.
+
         Args:
             n (int): The index of the sample to be loaded
         Returns:

torchaudio/datasets/librimix.py

@@ -77,6 +77,7 @@ class LibriMix(Dataset):
 
     def __getitem__(self, key: int) -> SampleType:
         """Load the n-th sample from the dataset.
+
         Args:
             key (int): The index of the sample to be loaded
         Returns: