Emoji serialized to Unicode escape sequence

[inflation]

I have some cursed configs with emojis (don't ask me why), and need to patch those files without touching other parts. It's all good until the last serialize part. Those emojis are converted to Unicode escape sequence:

let test = '🎉';
println!("{}", serde_yaml::to_string(&test).unwrap());

Output: "\U0001F389"

Although, it's technically equivalent but not very human-readable. PyYAML has an option allow_unicode for dump to keep them. I'd love to see a similar option for serde-yaml.

[dtolnay]

Fixed in serde_yaml 0.9.18.