format

    fn format(data: FormatData, w: *Writer) Writer.Error!void {
        assert(data.string != .none);
        const string_slice = data.string.slice(data.builder) orelse
            return w.print("{d}", .{@backingInt(data.string)});
        const quote_behavior = data.quote_behavior orelse return w.writeAll(string_slice);
        return printEscapedString(string_slice, quote_behavior, w);
    }