You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: journald.rs
    path of file: ./repos/tracing/examples/examples
    
    the code of the file until where you have to start completion: #![deny(rust_2018_idioms)]
use tracing::{error, info};
use tracing_subscriber::prelude::*;

#[path = "fmt/yak_shave.rs"]
mod yak_shave;

fn main() {
    let registry = tracing_subscriber::registry()
        .with(tracing_subscriber::fmt::subscriber().with_target(false));
    match tracing_journald::subscriber() {
        Ok(subscriber) => {
            registry.with(subscriber).init();
        }
        // journald is typically available on Linux systems, but nowhere else. Portable software
        // should ha
    
fn main() {
    let registry = tracing_subscriber::registry()
        .with(tracing_subscriber::fmt::subscriber().with_target(false));
    match tracing_journald::subscriber() {
        Ok(subscriber) => {
            registry.with(subscriber).init();
        }
        // journald is typically available on Linux systems, but nowhere else. Portable software
        // should handle its absence gracefully.
        Err(e) => {
            registry.init();
            error!("couldn't connect to journald: {}", e);
        }
    }

    let number_of_yaks = 3;
    // this creates a new event, outside of any spans.
    info!(number_of_yaks, "preparing to shave yaks");

    let number_shaved = yak_shave::shave_all(number_of_yaks);
    info!(
        all_yaks_shaved = number_shaved == number_of_yaks,
        "yak shaving completed."
    );
}