make style

examples/distillation/run_squad_w_distillation.py

@@ -39,15 +39,15 @@ from transformers import (
     DistilBertConfig,
     DistilBertForQuestionAnswering,
     DistilBertTokenizer,
+    RobertaConfig,
+    RobertaForQuestionAnswering,
+    RobertaTokenizer,
     XLMConfig,
     XLMForQuestionAnswering,
     XLMTokenizer,
     XLNetConfig,
     XLNetForQuestionAnswering,
     XLNetTokenizer,
-    RobertaConfig,
-    RobertaForQuestionAnswering,
-    RobertaTokenizer,
     get_linear_schedule_with_warmup,
     squad_convert_examples_to_features,
 )