Tell Rust you're not going to change the map

[abdurraheemali]

tiktoken/src/lib.rs

Lines 419 to 421 in ab3688a

	// Clone because I don't know how to tell Rust I'm not going to change the map
	let mut sorted_token_bytes: Vec<Vec<u8>> = encoder.keys().cloned().collect();
	sorted_token_bytes.sort();

[hauntsaninja]

Hello! Not sure why you've created an issue... I wrote that comment so I clearly already know about it ;-) If you want to change something, feel free to propose a PR. But in the meantime, I'm closing this, #5 and #6