x448.utils.randomPrivateKey() returns 57 bytes instead of 56?

[larabr]

I have seen a commit trying to clarify this (77bee0d), but I still don't get it, how is RFC8032 relevant for x448?
Having 57 bytes generated was really unexpected.

[paulmillr]

I think you are correct and this one is invalid.

[paulmillr]

fixed