Speeded up print_record() call ~100 times by looking for match inside one bib99x table (instead of in all 100 bibXXx tables). However, it may still be good to keep this 'prettifying' feature disabled. (The proper treatment here should be to go through 999 field instances one by one, so we should know about $s and $r we have, and we should not need any print_record() style of detection.)