Macro warn 

macro_rules! warn {
    ($format_str:literal $(, $arg:expr)* $(,)?) => { ... };
    ([$($format_str:literal),+ $(,)?] $(, $arg:expr)* $(,)?) => { ... };
}

Like log::warn, but bunt-compatible.

Example

use bunt_logger::warn;

warn!("He likes {$yellow}lemons{/$}, like {$blue+italic}a lot{/$}.");