Function join_class

primitives/src/lib.rs:406–413

(a: &str, b: &str)

    }

    merged
}

fn join_class(a: &str, b: &str) -> String {
    let (a, b) = (a.trim(), b.trim());
    if !a.is_empty() && !b.is_empty() {
        format!("{a} {b}")
    } else {
        format!("{a}{b}")
    }
}