in src/scalar.rs [394:403]
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer
{
use serde::ser::SerializeTuple;
let mut tup = serializer.serialize_tuple(32)?;
for byte in self.as_bytes().iter() {
tup.serialize_element(byte)?;
}
tup.end()
}