[jerf]

My apologies, I seem to have confused the two packages. I don't see it in the godoc either. In which case I echo your desire to have an explicit method of formatting and wrapping.

I suppose it won't take long for a component of one of the gometalinter or golang-ci or whatever to develop a "Errorf used without %w in the final position" warning, which will be good enough for me, but it would be better to have something like Wrap officially, IMHO.