{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"//"}]}
            // this goes through `literal_from_str` as of 2022-07-18, cf.
        TokenTree::Literal(orig) => {
            // https://github.com/rust-lang/rust/commit/b34c79f8f1ef4d0149ad4bf77e1759c07a9a01a8