pytorch

26d9386f - Make string serialization of C++ FunctionSchema consistent with torchgen.model.FunctionSchema

Make string serialization of C++ FunctionSchema consistent with torchgen.model.FunctionSchema Pull Request resolved: https://github.com/pytorch/pytorch/pull/77926 There is a discrepency between the string representation of C++ FunctionSchema and torchgen.model.FunctionSchema. The latter will not add parenthesis around the returned types if that a single item, but the C++ FunctionSchema always add the parenthesis. Make them consistent so we can convert one type to the other via its string representation and parse method. Differential Revision: [D36535924](https://our.internmc.facebook.com/intern/diff/D36535924/) Approved by: https://github.com/bdhirsh