Surely I should have have better shut up rather than saying something wrong

No. Without somebody saying something wrong there would be no need for correction and this bit wouldn't have been revealed. Your remark triggered me to look through my mail folders... ah, there! Later I looked up the documentation, well this must have been documented somewhere... and I had overlooked that tiny bit in perlop as well. Which reminds me that I, shame on me, in contrast to Abigail, *still* didn't read all of the standard perl documentation. It is so dense.

So, thanks to you as well, dear fellow.