Update files from the datasets library (from 1.6.1)

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

persian_ner.py

@@ -137,7 +137,7 @@ class PersianNER(datasets.GeneratorBasedBuilder):
         ]
 
     def _generate_examples(self, filepath, split):
-        """ Yields examples. """
+        """Yields examples."""
 
         with open(filepath, "r", encoding="utf-8") as f:
             id_ = 0