Fix typo

Fixes pytorch#77412

Signed-off-by: Edward Z. Yang <ezyangfb.com>

Pull Request resolved: pytorch#77488

Approved by: https://github.com/mruberry

torchgen/model.py

@@ -1961,7 +1961,7 @@ def __post_init__(self) -> None:
             assert not gets_generated_view_copy(self.view), (
                 f"{str(self.view.func.name)} appears to be a new operator that aliases its inputs."
                 " The codegen expects you to add a corresponding operator to native_functions.yaml:"
-                f" {get_view_copy_name(self.view):!s}."
+                f" {get_view_copy_name(self.view)!s}."
                 " See Note [view_copy NativeFunctions] for details."
             )
         else: