OCPBUGS-61061: add blank line before error in upgrade recommend --version output

pkg/cli/admin/upgrade/recommend/examples/4.14.1-all-recommended.version-4.12.51-output

@@ -10,5 +10,4 @@ recommended/Alert=Unknown:
 
 Upstream update service: https://api.integration.openshift.com/api/upgrades_info/graph
 Channel: candidate-4.14 (available channels: candidate-4.14, candidate-4.15, eus-4.14, fast-4.14, stable-4.14)
-
 error: no updates to 4.12 available, so cannot display context for the requested release 4.12.51

pkg/cli/admin/upgrade/recommend/examples/4.22.0-extend-recommended-alert.version-1.2.3-not-important-output

@@ -17,5 +17,4 @@ recommended/UpdatePrecheckAlerts/VirtHandlerDaemonSetRolloutFailing/2=False:
   Reason: Alert:firing
   Message: warning alert VirtHandlerDaemonSetRolloutFailing firing, suggesting issues worth investigating before updating the cluster. Test summary. The alert description is: Test description. <alert does not have a runbook_url annotation>
 
-
 error: no updates available, so cannot display context for the requested release 1.2.3-not-important

pkg/cli/admin/upgrade/recommend/examples/4.22.0-extend-recommended-critical-alert.version-1.2.3-not-important-output

@@ -7,5 +7,4 @@ recommended/CriticalAlerts/VirtHandlerDaemonSetRolloutFailing/0=False:
   Reason: Alert:firing
   Message: critical alert VirtHandlerDaemonSetRolloutFailing firing, suggesting significant cluster issues worth investigating. Test summary. The alert description is: Test description. <alert does not have a runbook_url annotation>
 
-
 error: no updates available, so cannot display context for the requested release 1.2.3-not-important

pkg/cli/admin/upgrade/recommend/examples_test.go

@@ -101,7 +101,7 @@ func TestExamples(t *testing.T) {
 				opts.ErrOut = &stderr
 
 				if err := opts.Run(context.Background()); err != nil {
-					compareWithFixture(t, bytes.Join([][]byte{stdout.Bytes(), []byte("\nerror: "), []byte(err.Error()), []byte("\n")}, []byte{}), cv, variant.outputSuffix)
+					compareWithFixture(t, bytes.Join([][]byte{stdout.Bytes(), []byte("error: "), []byte(err.Error()), []byte("\n")}, []byte{}), cv, variant.outputSuffix)
 				} else {
 					compareWithFixture(t, stdout.Bytes(), cv, variant.outputSuffix)
 				}

pkg/cli/admin/upgrade/recommend/recommend.go

@@ -366,6 +366,9 @@ func (o *options) Run(ctx context.Context) error {
 					}
 					unaccepted := issues.Difference(accept)
 					if unaccepted.Len() > 0 {
+						if !o.quiet {
+							fmt.Fprintln(o.Out)
+						}
 						if cvoChecking {
 							return fmt.Errorf("There are issues that apply to this cluster and have not been accepted. `oc adm upgrade accept` can be used to accept them: %s\n", strings.Join(sets.List(unaccepted), ","))
 						}