Update exp_informer.py

exp/exp_informer.py

@@ -1,7 +1,7 @@
 from data.data_loader import Dataset_ETT_hour, Dataset_ETT_minute, Dataset_Custom, Dataset_Pred
 from exp.exp_basic import Exp_Basic
 from models.model import Informer, InformerStack
- 
+
 from utils.tools import EarlyStopping, adjust_learning_rate
 from utils.metrics import metric