diff --git a/wesep/modules/common/norm.py b/wesep/modules/common/norm.py
index 1001719..449ff75 100644
--- a/wesep/modules/common/norm.py
+++ b/wesep/modules/common/norm.py
@@ -187,5 +187,5 @@ def forward(self, input, embed):
         return res
 
     def extra_repr(self):
-        return "{normalized_shape}, {embed_dim}, modulate_bias={modulate_bias}, eps={eps}".format(
-            **self.__dict__)
+        return "{normalized_shape}, {embed_dim}, \
+            modulate_bias={modulate_bias}, eps={eps}".format(**self.__dict__)