Change the PEM block type to use the constant

staging/src/k8s.io/client-go/util/cert/csr.go

@@ -51,7 +51,7 @@ func MakeCSRFromTemplate(privateKey interface{}, template *x509.CertificateReque
 	}
 
 	csrPemBlock := &pem.Block{
-		Type:  "CERTIFICATE REQUEST",
+		Type:  CertificateRequestBlockType,
 		Bytes: csrDER,
 	}
 

staging/src/k8s.io/client-go/util/cert/csr_test.go

@@ -52,7 +52,7 @@ func TestMakeCSR(t *testing.T) {
 	if len(rest) != 0 {
 		t.Error("Found more than one PEM encoded block in the result.")
 	}
-	if csrBlock.Type != "CERTIFICATE REQUEST" {
+	if csrBlock.Type != CertificateRequestBlockType {
 		t.Errorf("Found block type %q, wanted 'CERTIFICATE REQUEST'", csrBlock.Type)
 	}
 	csr, err := x509.ParseCertificateRequest(csrBlock.Bytes)