quickfix: suggest the %w verb in fmt.Errorf

[yasushi-saito]

fmt.Errorf("message: %w", err) is better.
The latter supports the error unwrapping API added in 1.13.

[ainar-g]

I'm not against it, but it will be very prone to false positives, since some people might actually want the error to be unwrappable. That's why early Go 1.13 errors proposals had the Opaque function.

[dominikh]

I have relabeled this issue as a new check for quickfix, a planned set of checks that make optional suggestions strictly in the context of LSP (via gopls).

I agree with Ainar that this would cause false positives, thereby making it nonviable as an ordinary check.