Update DiaBLa.py

DiaBLa.py

@@ -125,7 +125,7 @@ class Diabla(datasets.GeneratorBasedBuilder):
                         'mt_text': mt_text,
                         'id': id_,
                         'ref_text': reference_text,
-                        'utterance_meta_info': utterance_info
+                        'utterance_meta_info': utterance_info,
                         'context': dialogue_history
                     }
                     # add to history (without dialogue info)