Slices

For slices ({=[u8]}) the length is LEB128 encoded and serialized first and then followed by the slice data.

#![allow(unused)]
fn main() {
extern crate defmt;
defmt::error!("Data: {=[u8]}!", [0, 1, 2]);
// on the wire: [1, 3, 0, 1, 2]
//  string index ^  ^  ^^^^^^^ the slice data
//   LEB128(length) ^
}