Improve markdown highlighting in namespaces user guide.

docs/user-guide/namespaces/README.md

@@ -58,7 +58,7 @@ services, and replication controllers used by the cluster.
 
 Assuming you have a fresh cluster, you can introspect the available namespace's by doing the following:
 
-```shell
+```console
 $ kubectl get namespaces
 NAME                LABELS
 default             <none>
@@ -83,7 +83,7 @@ Let's create two new namespaces to hold our work.
 
 Use the file [`namespace-dev.json`](namespace-dev.json) which describes a development namespace:
 
-```js
+```json
 {
   "kind": "Namespace",
   "apiVersion": "v1",
@@ -98,19 +98,19 @@ Use the file [`namespace-dev.json`](namespace-dev.json) which describes a develo
 
 Create the development namespace using kubectl.
 
-```shell
+```console
 $ kubectl create -f docs/user-guide/namespaces/namespace-dev.json
 ```
 
 And then lets create the production namespace using kubectl.
 
-```shell
+```console
 $ kubectl create -f docs/user-guide/namespaces/namespace-prod.json
 ```
 
 To be sure things are right, let's list all of the namespaces in our cluster.
 
-```shell
+```console
 $ kubectl get namespaces
 NAME          LABELS             STATUS
 default       <none>             Active
@@ -129,7 +129,7 @@ To demonstrate this, let's spin up a simple replication controller and pod in th
 
 We first check what is the current context:
 
-```shell
+```yaml
 apiVersion: v1
 clusters:
 - cluster:
@@ -158,7 +158,7 @@ users:
 
 The next step is to define a context for the kubectl client to work in each namespace. The value of "cluster" and "user" fields are copied from the current context.
 
-```shell
+```console
 $ kubectl config set-context dev --namespace=development --cluster=lithe-cocoa-92103_kubernetes --user=lithe-cocoa-92103_kubernetes
 $ kubectl config set-context prod --namespace=production --cluster=lithe-cocoa-92103_kubernetes --user=lithe-cocoa-92103_kubernetes
 ```
@@ -168,14 +168,17 @@ wish to work against.
 
 Let's switch to operate in the development namespace.
 
-```shell
+```console
 $ kubectl config use-context dev
 ```
 
 You can verify your current context by doing the following:
 
-```shell
+```console
 $ kubectl config view
+```
+
+```yaml
 apiVersion: v1
 clusters:
 - cluster:
@@ -216,13 +219,13 @@ At this point, all requests we make to the Kubernetes cluster from the command l
 
 Let's create some content.
 
-```shell
+```console
 $ kubectl run snowflake --image=kubernetes/serve_hostname --replicas=2
 ```
 
 We have just created a replication controller whose replica size is 2 that is running the pod called snowflake with a basic container that just serves the hostname.
 
-```shell
+```console
 $ kubectl get rc
 CONTROLLER   CONTAINER(S)   IMAGE(S)                    SELECTOR        REPLICAS
 snowflake    snowflake      kubernetes/serve_hostname   run=snowflake   2
@@ -237,13 +240,13 @@ And this is great, developers are able to do what they want, and they do not hav
 
 Let's switch to the production namespace and show how resources in one namespace are hidden from the other.
 
-```shell
+```console
 $ kubectl config use-context prod
 ```
 
 The production namespace should be empty.
 
-```shell
+```console
 $ kubectl get rc
 CONTROLLER   CONTAINER(S)   IMAGE(S)   SELECTOR   REPLICAS
 
@@ -253,7 +256,7 @@ NAME      READY     STATUS    RESTARTS   AGE
 
 Production likes to run cattle, so let's create some cattle pods.
 
-```shell
+```console
 $ kubectl run cattle --image=kubernetes/serve_hostname --replicas=5
 
 $ kubectl get rc