OCPBUGS-1874-post: Fixed code block guideline issues for shared VPC On GCP docs

Author: dfitzmau

modules/installation-creating-gcp-bootstrap.adoc

@@ -51,6 +51,10 @@ $ export CLUSTER_IMAGE=(`gcloud compute images describe ${INFRA_ID}-rhcos-image
 [source,terminal]
 ----
 $ gsutil mb gs://${INFRA_ID}-bootstrap-ignition
+----
++
+[source,terminal]
+----
 $ gsutil cp <installation_directory>/bootstrap.ign gs://${INFRA_ID}-bootstrap-ignition/
 ----
 

modules/installation-creating-gcp-control-plane.adoc

@@ -95,7 +95,15 @@ Manager, so you must add the control plane machines manually.
 [source,terminal]
 ----
 $ gcloud compute instance-groups unmanaged add-instances ${INFRA_ID}-master-${ZONE_0}-ig --zone=${ZONE_0} --instances=${INFRA_ID}-master-0
+----
++
+[source,terminal]
+----
 $ gcloud compute instance-groups unmanaged add-instances ${INFRA_ID}-master-${ZONE_1}-ig --zone=${ZONE_1} --instances=${INFRA_ID}-master-1
+----
++
+[source,terminal]
+----
 $ gcloud compute instance-groups unmanaged add-instances ${INFRA_ID}-master-${ZONE_2}-ig --zone=${ZONE_2} --instances=${INFRA_ID}-master-2
 ----
 
@@ -104,7 +112,15 @@ $ gcloud compute instance-groups unmanaged add-instances ${INFRA_ID}-master-${ZO
 [source,terminal]
 ----
 $ gcloud compute target-pools add-instances ${INFRA_ID}-api-target-pool --instances-zone="${ZONE_0}" --instances=${INFRA_ID}-master-0
+----
++
+[source,terminal]
+----
 $ gcloud compute target-pools add-instances ${INFRA_ID}-api-target-pool --instances-zone="${ZONE_1}" --instances=${INFRA_ID}-master-1
+----
++
+[source,terminal]
+----
 $ gcloud compute target-pools add-instances ${INFRA_ID}-api-target-pool --instances-zone="${ZONE_2}" --instances=${INFRA_ID}-master-2
 ----
 

modules/installation-gcp-user-infra-wait-for-bootstrap.adoc

@@ -45,7 +45,19 @@ has initialized.
 [source,terminal]
 ----
 $ gcloud compute backend-services remove-backend ${INFRA_ID}-api-internal-backend-service --region=${REGION} --instance-group=${INFRA_ID}-bootstrap-ig --instance-group-zone=${ZONE_0}
+----
++
+[source,terminal]
+----
 $ gsutil rm gs://${INFRA_ID}-bootstrap-ignition/bootstrap.ign
+----
++
+[source,terminal]
+----
 $ gsutil rb gs://${INFRA_ID}-bootstrap-ignition
+----
++
+[source,terminal]
+----
 $ gcloud deployment-manager deployments delete ${INFRA_ID}-bootstrap
 ----