{"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"write!(w,"}]}
            write!(w, "{c:02x}")?;
            let c = alloc.inspect_with_uninit_and_ptr_outside_interpreter(j..j + 1)[0];
            if c.is_ascii_control() || c >= 0x80 {