crypto/x509: gofmt

Change-Id: I05659a836612f958083fea9a27805eb9f0ac0836
Reviewed-on: https://go-review.googlesource.com/22145
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/crypto/x509/x509_test.go

@@ -1183,7 +1183,7 @@ func TestNoAuthorityKeyIdInSelfSignedCert(t *testing.T) {
 		t.Fatalf("self-signed certificate contained default authority key id")
 	}
 
-	template.AuthorityKeyId = []byte{1,2,3,4}
+	template.AuthorityKeyId = []byte{1, 2, 3, 4}
 	if cert := serialiseAndParse(t, template); len(cert.AuthorityKeyId) == 0 {
 		t.Fatalf("self-signed certificate erased explicit authority key id")
 	}