Improve formatting

Author: tadejsv

tests/metrics/test_metric.py

@@ -25,6 +25,7 @@ def update(self):
     def compute(self):
         pass
 
+
 class DummyList(Metric):
     name = "DummyList"
 
@@ -38,6 +39,7 @@ def update(self):
     def compute(self):
         pass
 
+
 def test_inherit():
     a = Dummy()
 
@@ -91,7 +93,7 @@ class A(Dummy):
 
     class B(DummyList):
         pass
-        
+
     a = A()
     assert a.x == 0
     a.x = torch.tensor(5)
@@ -104,6 +106,7 @@ class B(DummyList):
     b.reset()
     assert isinstance(b.x, list) and len(b.x) == 0
 
+
 def test_update():
     class A(Dummy):
         def update(self, x):