src/tools/rustfmt/tests/source/issue-4577.rs


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fn main() {
    let s: String = "ABAABBAA".chars()
        .filter(|c| {
            if *c == 'A' {
                true
            }
            else {
                false
            }
        })
        .map(|c| -> char {
        if c == 'A' {
            '0'
        } else {
            '1'
        }
    }).collect();
    
    println!("{}", s);
}