Update files from the datasets library (from 1.6.1)

Release notes: https://github.com/huggingface/datasets/releases/tag/1.6.1

guardian_authorship.py

@@ -65,7 +65,7 @@ _URL = "https://www.dropbox.com/s/lc5mje0owl9shms/Guardian.zip?dl=1"
 # to add specific attributes.
 # here we give an example for three sub-set of the dataset with difference sizes.
 class GuardianAuthorshipConfig(datasets.BuilderConfig):
-    """ BuilderConfig for NewDataset"""
+    """BuilderConfig for NewDataset"""
 
     def __init__(self, train_folder, valid_folder, test_folder, **kwargs):
         """
@@ -304,7 +304,7 @@ class GuardianAuthorship(datasets.GeneratorBasedBuilder):
         ]
 
     def _generate_examples(self, data_dir, samples_folders, split):
-        """ Yields examples. """
+        """Yields examples."""
         # Yields (key, example) tuples from the dataset
 
         # Training and validation are on 1 topic/genre, while testing is on multiple topics