web: Improve server doc test

Author: Luni-4

rust-code-analysis-web/src/web/server.rs

@@ -225,23 +225,21 @@ async fn ping() -> HttpResponse {
 ///
 /// # Examples
 ///
-/// ```
+/// ```no_run
 /// use rust_code_analysis_web::server::run;
 ///
-/// let host = "127.0.0.1";
-/// let port = 8080;
-/// let num_threads = 4;
+/// #[actix_web::main]
+/// async fn main() {
+///     let host = "127.0.0.1";
+///     let port = 8080;
+///     let num_threads = 4;
 ///
-/// // Runs a server on a determined host with a specific port and using certain
-/// // number of threads.
-/// // If the server runs correctly, it will be immediately interrupted,
-/// // otherwise an error will be shown.
-/// match run(&host, port, num_threads).await {
-///     Ok(_) => std::process::exit(0),
-///     Err(e) => eprintln!(
-///          "Cannot run the server at {}:{}: {}",
-///          host, port, e
-///     ),
+///     // Runs a server on a determined host with a specific port and using a
+///     // certain number of threads.
+///     // If the server does not run correctly, an error will be shown.
+///     if let Err(e) = run(host, port, num_threads).await {
+///        eprintln!("Cannot run the server at {host}:{port}: {e}");
+///     }
 /// }
 /// ```
 pub async fn run(host: &str, port: u16, n_threads: usize) -> std::io::Result<()> {