pytorch

1d3d9ec7 - C++ API Parity: `functional::fold` and `Fold::pretty_print` (#28732)

C++ API Parity: `functional::fold` and `Fold::pretty_print` (#28732) Summary: Adds `torch::nn::functional::fold` support and updates `Fold::pretty_print` in the C++ API for more thorough Python parity. Note: Small updates in source files to maintain consistency elsewhere. Reviewer: yf225 Pull Request resolved: https://github.com/pytorch/pytorch/pull/28732 Differential Revision: D18219955 Pulled By: yf225 fbshipit-source-id: fd2e9be8f17db77c1b1f384c0d2e16cc34858c0c