Simplify the code, using `into_encoded_bytes` #647

Job	Run time
test	11m 0s
cargo-deny-advisories	28s
lint	1m 32s
pure-rust-build	2m 7s
test-32bit (i386)	5m 51s
test-fast (windows-latest)	13m 9s
test-fixtures-windows	15m 16s
test-32bit (arm32v7)	5m 40s
test-fast (macos-latest)	4m 55s
test-fast (ubuntu-latest)	3m 59s
test-journey	4m 3s
test-fast (ubuntu-22.04-arm)	6m 10s
cargo-deny	29s
check-blocking	7s
check-packetline (ubuntu-latest)	5s
WebAssembly (wasm32-unknown-unknown)	1m 15s
WebAssembly (wasm32-wasip1)	37s
Tests pass	1s
	1h 16m 44s

Provide feedback