Changes

Doc: Marshal.to_channel may throw exception (#10012)

`Marshal.to_channel` and `Marshal.from_channel` throw an exception if the provided channel is not in binary mode (mostly an issue on Windows).

This commit documents this fact, using @raise tags.

Co-authored-by: David Allsopp <david.allsopp@metastack.com>
 (commit: 36cf9f9)