Function validate 

pub fn validate(
    answer: &Value,
    changed: &[(String, String)],
    config: &StrengthConfig,
    notes: &mut Vec<String>,
) -> (Vec<Variant>, Vec<Variant>)

The author’s answer, validated: only the changed source files, each a real change, no duplicates, at most near_miss wrong and permitted permitted. What was dropped and why goes to notes.