Format long clap attribute on multiple lines

Author: dtolnay

src/main.rs

@@ -24,7 +24,13 @@ const HELP: &str = "\
 ";
 
 #[derive(ClapParser, Debug)]
-#[command(about = "Rust Quiz", version, author, help_template = HELP, disable_help_subcommand = true)]
+#[command(
+    about = "Rust Quiz",
+    version,
+    author,
+    help_template = HELP,
+    disable_help_subcommand = true,
+)]
 struct Opt {
     #[clap(subcommand)]
     serve: Option<Subcommand>,