The Glossary and "Type Layout" don't specify the size of a "byte".

• Was that intentional?
• Is it a real byte? (platform-dependent smallest unit of addressable memory?)
• Is it guaranteed to be an octet?

I think it's worth being explicit about that.

BTW, the bool reference seems somewhat contradictory:

• size_of::<bool>() == 1 implies platform-dependent byte
• The hexadecimal bit-patterns imply u8 (guaranteed octet)

IMO, bytes are more honest and correct than octets (for bool and some enums, at least). For primitives such as char and u8, an exact bit-count is better than bytes