Slightly improve error reporting in the example

platforms/winit/examples/simple.rs

@@ -132,7 +132,7 @@ impl State {
     }
 }
 
-fn main() {
+fn main() -> Result<(), impl std::error::Error> {
     println!("This example has no visible GUI, and a keyboard interface:");
     println!("- [Tab] switches focus between two logical buttons.");
     println!("- [Space] 'presses' the button, adding static text in a live region announcing that it was pressed.");
@@ -150,15 +150,14 @@ fn main() {
     ))]
     println!("Enable Orca with [Super]+[Alt]+[S].");
 
-    let event_loop = EventLoopBuilder::with_user_event().build().unwrap();
+    let event_loop = EventLoopBuilder::with_user_event().build()?;
 
     let state = State::new();
 
     let window = WindowBuilder::new()
         .with_title(WINDOW_TITLE)
         .with_visible(false)
-        .build(&event_loop)
-        .unwrap();
+        .build(&event_loop)?;
 
     let adapter = {
         let state = Arc::clone(&state);
@@ -174,7 +173,7 @@ fn main() {
 
     window.set_visible(true);
 
-    let _ = event_loop.run(move |event, event_loop| {
+    event_loop.run(move |event, event_loop| {
         event_loop.set_control_flow(ControlFlow::Wait);
 
         match event {
@@ -231,5 +230,5 @@ fn main() {
             }
             _ => (),
         }
-    });
+    })
 }