Fix output formatting for Getting Into Containers doc

docs/user-guide/getting-into-containers.md

@@ -40,14 +40,14 @@ Kubernetes exposes [services](services.md#environment-variables) through environ
 
 We first create a pod and a service,
 
-```
+```console
 $ kubectl create -f examples/guestbook/redis-master-controller.yaml
 $ kubectl create -f examples/guestbook/redis-master-service.yaml
 ```
 
 wait until the pod is Running and Ready,
 
-```
+```console
 $ kubectl get pod
 NAME                 READY     REASON       RESTARTS   AGE
 redis-master-ft9ex   1/1       Running      0          12s
@@ -55,7 +55,7 @@ redis-master-ft9ex   1/1       Running      0          12s
 
 then we can check the environment variables of the pod, 
 
-```
+```console
 $ kubectl exec redis-master-ft9ex env
 ...
 REDIS_MASTER_SERVICE_PORT=6379
@@ -71,13 +71,13 @@ We can use these environment variables in applications to find the service.
 It is convenient to use `kubectl exec` to check if the volumes are mounted as expected.
 We first create a Pod with a volume mounted at /data/redis,
 
-```
+```console
 kubectl create -f docs/user-guide/walkthrough/pod-redis.yaml
 ```
 
 wait until the pod is Running and Ready,
 
-```
+```console
 $ kubectl get pods
 NAME      READY     REASON    RESTARTS   AGE
 storage   1/1       Running   0          1m
@@ -85,7 +85,7 @@ storage   1/1       Running   0          1m
 
 we then use `kubectl exec` to verify that the volume is mounted at /data/redis,
 
-```
+```console
 $ kubectl exec storage ls /data
 redis
 ```
@@ -94,7 +94,7 @@ redis
 
 After all, open a terminal in a pod is the most direct way to introspect the pod. Assuming the pod/storage is still running, run
 
-```
+```console
 $ kubectl exec -ti storage -- bash
 root@storage:/data#
 ```