peppergrep 0.1.1

A simple grep utility written following the 12th chapter of the Rust book. Some little modifications were made.
Documentation 
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use std::{env, process};

use peppergrep::Config;

fn main() {
    let config = Config::build(env::args()).unwrap_or_else(|err| {
        eprintln!("Problem parsing arguments: {err}");
        process::exit(1);
    });

    if let Err(e) = peppergrep::run(config) {
        eprintln!("Application error: {e}");
        process::exit(1);
    }
}