[FX][docs] Indent forward (pytorch#51802)

Summary:
Pull Request resolved: pytorch#51802

lol

Test Plan: Imported from OSS

Reviewed By: zou3519

Differential Revision: D26284311

Pulled By: jamesr66a

fbshipit-source-id: 0d303d8c99131abb8d97e0acd0ac2d810e1e950c

Author: James Reed

torch/fx/__init__.py

@@ -17,8 +17,8 @@ def __init__(self):
             self.param = torch.nn.Parameter(torch.rand(3, 4))
             self.linear = torch.nn.Linear(4, 5)
 
-    def forward(self, x):
-        return self.linear(x + self.param).clamp(min=0.0, max=1.0)
+        def forward(self, x):
+            return self.linear(x + self.param).clamp(min=0.0, max=1.0)
 
     module = MyModule()