{"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"assert_eq!(t2.token_trees.len(),"}]}
        assert_eq!(t2.token_trees.len(), 3);
        let t2 = TokenStream::from_str("(a);", span).unwrap();
        assert!(t2.token_trees[0..2] == subtree_paren_a);