Stream output to a file (Rust)

use lumis::{write_highlight, HtmlInlineBuilder, languages::Language};
use std::fs::File;

let formatter = HtmlInlineBuilder::new()
    .language(Language::Rust)
    .build()
    .unwrap();

let mut file = File::create("output.html").unwrap();
write_highlight(&mut file, "fn main() {}", formatter).unwrap();

See Rust for guidance on when to use highlight() vs write_highlight().