swift

2d7040d6 - [NFC][Concurrency] Document BufferingPolicy behavior for non-positive buffer sizes (#87191)

[NFC][Concurrency] Document BufferingPolicy behavior for non-positive buffer sizes (#87191) Updated `AsyncStream` and `AsyncThrowingStream` `BufferingPolicy` documentation to clarify behavior for non-positive buffer sizes and to make comments consistent between the two types.