The following things lack documentation in Trio's documentation:

• trio.CancelScope.relative_deadline
• trio.MemorySendChannel
• trio.MemoryReceiveChannel
• trio.MemoryChannelStatistics
• trio.SocketStream.aclose
• trio.SocketStream.receive_some
• trio.SocketStream.send_all
• trio.SocketStream.send_eof
• trio.SocketStream.wait_send_all_might_not_block
• trio._subprocess.HasFileno.fileno
• trio.lowlevel.ParkingLot.broken_by

These should either have documentation or not show up (e.g. the SocketStream attributes seem unnecessary, they're only in the docs because of a :undoc-members:).

At https://trio.readthedocs.io/en/latest/reference-core.html#trio.CancelScope.relative_deadline, there is no definition of the semantics of relative_deadline. Looks like it was added in #3010.