pub fn init(level: log::LevelFilter) -> Result<(), log::SetLoggerError> {
        log::set_logger(&LOGGER).map(|()| log::set_max_level(level))
    }
Create a new logger that logs to stderr and initialize it as the
global logger. If there was a problem setting the logger, then an
error is returned.
autocorrect-cli/src/logger.rs