I first thought about different warning that GNU grep >= 3.8 emits: about "stray \" (it's also in the changelog - https://lists.gnu.org/archive/html/info-gnu/20

I first thought about different warning that GNU grep >= 3.8 emits: about "stray \" (it's also in the changelog - https://lists.gnu.org/archive/html/info-gnu/2022-09/msg00001.html https://lists.gnu.org/archive/html/info-gnu/2022-09/msg00001...). I have personally seen this one several times already and I only have grep 3.8 on my desktop, as I use Debian stable everywhere else. But this warning may prevent hidden bugs in the future.