rust-i18n-cli can not catch all untranslated string

[wznmickey]

When I use macro over macro on the string, the string would not be detected.
For example,

#[macro_export]
macro_rules! warn {
    ($($args:tt)*) => {
        log::log!(log::Level::Warn, "{}", rust_i18n::t!(format!($($args)*)));
    };
}
warn!(
                        "In getting {url} : {e} {retry}/10",
                        url = url,
                        e = e,
                        retry = retry
                    );

will not be detected.