{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"//"}]}
                // For the statements with attributes, like `{ #[allow()] println!("Hello!") }`,
            ast::ExprKind::Block(ref block, None) if let [stmt] = block.stmts.as_slice() => {
                // the span should contains the attributes, or the suggestion will remove them.