Method fmt

ch_05/handle-errors/src/lib.rs:16–22

(&self, f: &mut std::fmt::Formatter)

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            Error::ParseError(err) => write!(f, "Cannot parse parameter: {}", err),
            Error::MissingParameters => write!(f, "Missing parameter"),
            Error::QuestionNotFound => write!(f, "Question not found"),
        }
    }
}

impl Reject for Error {}