The result for the first test (with no key) was produced using the b2sum
utility (part of Git for Windows) with the "-a blake2b" option, because
that's the hash that is currently being used by libsodium for its Generic
Hashing API.
The "not tested" tag was added to avoid adding the libsodium dependency to
the automated build evnironment.
Doug Coleman
John Benediktsson
Alexander Iljin