{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
            let range_end = if l_range.contains_range(r_range) {
            format_to!(error_msg, "\x1b[44mleft change:\x1b[0m  {l:?} {l}\n");
                format_to!(error_msg, "\x1b[46mcovers\x1b[0m\n");