fix the indent

Author: zjzzqs

src/yews/models/polarity.py

@@ -129,7 +129,7 @@ def polarity_v1(pretrained=False, progress=True, **kwargs):
     return model
 
 
-  class PolarityV2(nn.Module):
+class PolarityV2(nn.Module):
 
     #https://github.com/pytorch/vision/blob/master/torchvision/models/vgg.py