Function encode 

pub fn encode(dodecets: &[Dodecet]) -> String

Encode a slice of dodecets to a hex string

Each dodecet becomes 3 hex characters.

Example

use dodecet_encoder::{Dodecet, hex};

let dodecets = vec![Dodecet::from_hex(0x123), Dodecet::from_hex(0x456)];
let hex_str = hex::encode(&dodecets);
assert_eq!(hex_str, "123456");