Update files from the datasets library (from 1.6.1)

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

hkcancor.py

@@ -242,7 +242,7 @@ class Hkcancor(datasets.GeneratorBasedBuilder):
         ]
 
     def _generate_examples(self, data_dir, split):
-        """ Yields examples. """
+        """Yields examples."""
 
         downloaded_files = [os.path.join(data_dir, fn) for fn in sorted(os.listdir(data_dir))]
         for filepath in downloaded_files: