Update DiaBLa.py

DiaBLa.py

@@ -203,7 +203,8 @@ class Diabla(datasets.GeneratorBasedBuilder):
                     }
                     
                     # add to history (without dialogue info and history)
-                    dialogue_history.append(utterance_instance.copy()) 
+                    minimal_utterance = utterance_instance.copy()
                     utterance_instance['dialogue_meta'] = dialogue_info
                     utterance_instance['dialogue_history'] = dialogue_history
+                    dialogue_history.append(minimal_utterance) 
                     yield id_, utterance_instance