Thanks, it's a brittle hack as you acknowledge but at least there won't be false negatives. Funny how often I wind up crawling back to Perl. The problem here i

Thanks, it's a brittle hack as you acknowledge but at least there won't be false negatives. Funny how often I wind up crawling back to Perl. The problem here is literally that someone hardcoded "IT'S ALWAYS LINEFEED" into an algorithm that could work equally well with any record separator character -- in fact probably with any record separator regex. I notice there's now `grep -z` which is one small step towards sanity... but the fully general problem is so easy and so useful to solve it's exasperating. I guess I should stop complaining and submit a patch to grep to add a `--dont-use-linefeed-instead-use <arg>` option already.