“the trait bound `!: FromStr` is not satisfied” how should I fix it?

Hello, I'm new to rust, so I don't understand some things. If you have time to explain the fix and help me to do it: thank you! #[allow(unused_imports)] use owo_colors::OwoColorize; mod display; macro_rules! error { ($($e:tt)*) => { eprintln!("{}: {}", "error".bold().red(), format!($($e)*)); }; } macro_rules! warn { ($($e:tt)*) => { eprintln!("{}: {}", "warning".bold().yellow(), format!($($e)*)); }; } macro_rules! exit { // rule one: does not specify the...