Fix lint (#1693)

Author: fmassa

references/detection/train.py

@@ -115,7 +115,7 @@ def main(args):
         optimizer.load_state_dict(checkpoint['optimizer'])
         lr_scheduler.load_state_dict(checkpoint['lr_scheduler'])
         args.start_epoch = checkpoint['epoch'] + 1
-        
+
     if args.test_only:
         evaluate(model, data_loader_test, device=device)
         return