go list sometimes sticks a leading newline in its error messages
have go/packages trim them until go list does the right thing
(of course, no one should depend on this behavior)
Fixesgolang/go#32363
Change-Id: I6e145fb85bfc9d710c5f06146a64ec6919f59e36
Reviewed-on: https://go-review.googlesource.com/c/tools/+/183258
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dominik Honnef <dominik@honnef.co>