58ac1b4244
Hide async_gen_internals from standard library documentation These are from https://github.com/rust-lang/rust/pull/118420. It doesn't appear that there is any intention to ever make these APIs available to user code. These are just conveniences meant for the compiler's implementation of `async gen`. I don't think having them featured in documentation in <https://doc.rust-lang.org/1.77.1/core/task/enum.Poll.html> is appropriate. 