Fix typo in EXPLANATION constant

Additionally, tried to clarify parts of the explanation

Author: Urpagin

delayserver/src/main.rs

@@ -1,15 +1,19 @@
-use std::{time::Duration, sync::atomic::{AtomicUsize, Ordering}, env};
-use actix_web::{Responder, get, HttpServer, App, web, rt::time::sleep};
+use actix_web::{get, rt::time::sleep, web, App, HttpServer, Responder};
+use std::{
+    env,
+    sync::atomic::{AtomicUsize, Ordering},
+    time::Duration,
+};
 
 const EXPLANATION: &str =
 "USAGE:
-Delay server works by issuing a http GET request in the format:
-http://localhost:8080/[delay in ms]/[UrlEncoded message]
+Delay server works by issuing an HTTP GET request in the format:
+http://localhost:8080/[delay in ms]/[URL-encoded message]
 
 If an argument is passed in when delayserver is started, that
-argument will be used as the url instead of 'localhost'
+argument will be used as the URL instead of 'localhost'.
 
-On reception, it immieiately reports the following to the console:
+Upon receiving a request, it immediately reports the following to the console:
 
 {Message #} - {delay in ms}: {message}
 
@@ -34,13 +38,10 @@ async fn main() -> std::io::Result<()> {
     let url = env::args()
         .nth(1)
         .unwrap_or_else(|| String::from("localhost"));
-    
+
     println!("{EXPLANATION}");
-    HttpServer::new(|| {
-        App::new()
-        .service(delay)
-    })
-    .bind((url, 8080))?
-    .run()
-    .await
+    HttpServer::new(|| App::new().service(delay))
+        .bind((url, 8080))?
+        .run()
+        .await
 }