Feedback about Introduction to torch.compile

[kangyuliu]

There is the following issue on this page: https://docs.pytorch.org/tutorials/intermediate/torch_compile_tutorial.html
`from functorch.experimental.control_flow import cond

@torch.compile(fullgraph=True)
def bar_fixed(a, b):
x = a / (torch.abs(a) + 1)

def true_branch(y):
    return y * -1

def false_branch(y):
    # NOTE: torch.cond doesn't allow aliased outputs
    return y.clone()

**x = cond(b.sum() < 0, true_branch, false_branch, (b,))**
return x * b

bar_fixed(inp1, inp2)
bar_fixed(inp1, -inp2)`

** line is error? should be b = cond(b.sum() < 0, true_branch, false_branch, (b,))