minigrep2 0.1.0

minigrep program from https://doc.rust-lang.org
Documentation 
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use std::{env, process};

use minigrep2::Config;

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

    if let Err(e) = minigrep2::run(config) {
        eprintln!("Application error: {}", e);
        process::exit(-1);
    }
}