{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"(\"{expr}"}]}
            ("{expr} is {2 + 2}", expect![["{expr} is {}; 2 + 2"]]),
            (r"no expressions with \$0$1", expect![r"no expressions with \$0$1"]),
            ("{expr:?}", expect![["{expr:?}"]]),