Forbid uses of unwrap() in the code (#7795)

examples/external_eventloop/src/main.rs

@@ -1,5 +1,5 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
-#![allow(rustdoc::missing_crate_level_docs)] // it's an example
+#![expect(rustdoc::missing_crate_level_docs, clippy::unwrap_used)] // it's an example
 
 use eframe::{UserEvent, egui};
 use std::{cell::Cell, rc::Rc};

examples/external_eventloop_async/src/app.rs

@@ -1,3 +1,5 @@
+#![expect(clippy::unwrap_used)] // It's an example
+
 use std::{cell::Cell, io, os::fd::AsRawFd as _, rc::Rc, time::Duration};
 
 use tokio::task::LocalSet;

examples/hello_world_par/src/main.rs

@@ -1,7 +1,7 @@
 //! This example shows that you can use egui in parallel from multiple threads.
 
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
-#![allow(rustdoc::missing_crate_level_docs)] // it's an example
+#![expect(clippy::unwrap_used)] // it's an example
 
 use std::sync::mpsc;
 use std::thread::JoinHandle;

examples/screenshot/src/main.rs

@@ -1,5 +1,5 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
-#![allow(rustdoc::missing_crate_level_docs)] // it's an example
+#![expect(rustdoc::missing_crate_level_docs, clippy::unwrap_used)] // it's an example
 
 use std::sync::Arc;