Use errors.New instead of fmt.Errorf.
Use errors.New instead of fmt.Errorf.

roth1002/gcloud-golang,proppy/gcloud-golang,googleapis/google-cloud-go,hsinhoyeh/gcloud-golang,Maksadbek/gcloud-golang,ptomasroos/gcloud-golang,blowmage/gcloud-golang,googleapis/google-cloud-go,googleapis/google-cloud-go,ptomasroos/gcloud-golang,michael-grosshans/google-cloud-go,roth1002/gcloud-golang,proppy/gcloud-golang,googleapis/google-cloud-go,blowmage/gcloud-golang,hsinhoyeh/gcloud-golang,Maksadbek/gcloud-golang,michael-grosshans/google-cloud-go