unix: gofmt after CL 610296

Also remove a few unhelpful blank lines.

Change-Id: I4001a25ec409406855b7800afd88738c43f60b90
Reviewed-on: https://go-review.googlesource.com/c/sys/+/621921
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>

unix/syscall_zos_test.go

@@ -3844,9 +3844,7 @@ func TestTty(t *testing.T) {
 		t.Fatalf("Open %s %+v\n", sname, err)
 	}
 	if _, err = unix.Fcntl(uintptr(ptsfd), unix.F_CONTROL_CVT, &cvtreq); err != nil {
-
 		t.Fatalf("fcntl F_CONTROL_CVT ptsfd %+v\n", err)
-
 	}
 
 	tt := os.NewFile(uintptr(ptsfd), sname)
@@ -3871,7 +3869,5 @@ func TestTty(t *testing.T) {
 
 	if !bytes.Equal(text, buffer[:n]) {
 		t.Fatalf("Expected %+v, read %+v\n", text, buffer[:n])
-
 	}
-
 }