Merge remote-tracking branch 'origin/main'

# Conflicts:
#	test/test_graphnet.py

Author: jameschapman19

proxtorch/operators/graphnet.py

@@ -15,9 +15,9 @@ def prox(self, x: torch.Tensor, tau: float) -> torch.Tensor:
 
     def _smooth(self, x: torch.Tensor) -> torch.Tensor:
         # The last channel is the for the l1 norm
-        grad = self.gradient(x)[:-1]/(1-self.l1_ratio)
+        grad = self.gradient(x)[:-1] / (1 - self.l1_ratio)
         # sum of squares of the gradients
-        norm = torch.sum(grad ** 2)
+        norm = torch.sum(grad**2)
         return 0.5 * norm * self.alpha * (1 - self.l1_ratio)
 
     def _nonsmooth(self, x: torch.Tensor) -> torch.Tensor: