Fixed indentation in data loader script

totto.py

@@ -118,7 +118,7 @@ class Mlsum(datasets.GeneratorBasedBuilder):
 
     def _generate_examples(self, filepath, split, filepaths=None, lang=None):
         """Yields examples."""
-	if "challenge" in split:
+        if "challenge" in split:
             exples = json.load(open(filepath, encoding="utf-8"))
             if isinstance(exples, dict):
                 assert len(exples) == 1, "multiple entries found"