os/user: clean error message formatting

Change-Id: I02728c690a377ecdd2a6bc92d1606cbae3e2723a
Reviewed-on: https://go-review.googlesource.com/c/go/+/196677
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/os/user/lookup_stubs.go b/src/os/user/lookup_stubs.go
index d3acbddd18019e9a469cca395bf015145468a313..7164514828fcd27417b6b4a6cf5eeee7c5465233 100644 (file)
--- a/src/os/user/lookup_stubs.go
+++ b/src/os/user/lookup_stubs.go
@@ -72,7 +72,7 @@ func current() (*User, error) {
 
 func listGroups(*User) ([]string, error) {
        if runtime.GOOS == "android" || runtime.GOOS == "aix" {
-               return nil, errors.New(fmt.Sprintf("user: GroupIds not implemented on %s", runtime.GOOS))
+               return nil, fmt.Errorf("user: GroupIds not implemented on %s", runtime.GOOS)
        }
        return nil, errors.New("user: GroupIds requires cgo")
 }