{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"if"}]}
                    if trimmed.chars().fold(true, |only_num, c| c.is_ascii_digit() && only_num) {
                    // see: https://doc.rust-lang.org/std/fmt/#positional-parameters
                        output.push_str(trimmed);