Slightly prettier error printing

Author: domenic

src/main.rs

@@ -20,6 +20,15 @@ mod tag_omission;
 
 #[tokio::main]
 async fn main() -> io::Result<()> {
+    // This gives slightly prettier error-printing.
+    if let Err(e) = run().await {
+        eprintln!("{}", e);
+        std::process::exit(1);
+    }
+    Ok(())
+}
+
+async fn run() -> io::Result<()> {
     // Since we're using Rc in the DOM implementation, we must ensure that tasks
     // which act on it are confined to this thread.