minor updates tutorial

- change afinity field value to match yaml spec
- update and reorder steps for cordoning nodes to make more sense. currenlty says "all but four". In reality, want to cordon the three nodes that the pods are scheduled on. not "all but four".
- add new line to code snippet for easier "copy/paste"

docs/tutorials/stateful-application/zookeeper.md

@@ -1022,13 +1022,6 @@ Get the nodes in your cluster.
 kubectl get nodes
 ```
 
-Use [`kubectl cordon`](/docs/user-guide/kubectl/{{page.version}}/#cordon) to 
-cordon all but four of the nodes in your cluster.
-
-```shell{% raw %}
-kubectl cordon < node name >
-```{% endraw %}
-
 Get the `zk-budget` PodDisruptionBudget.
 
 ```shell
@@ -1060,6 +1053,13 @@ kubernetes-minion-group-i4c4
 {% endraw %}
 ```
 
+Use [`kubectl cordon`](/docs/user-guide/kubectl/{{page.version}}/#cordon) to 
+cordon the three nodes that the Pods are currently scheduled on.
+
+```shell{% raw %}
+kubectl cordon < node name >
+{% endraw %}```
+
 Use [`kubectl drain`](/docs/user-guide/kubectl/{{page.version}}/#drain) to cordon and 
 drain the node on which the `zk-0` Pod is scheduled.
 
@@ -1095,7 +1095,8 @@ Keep watching the StatefulSet's Pods in the first terminal and drain the node on
 `zk-1` is scheduled.
 
 ```shell{% raw %}
-kubectl drain $(kubectl get pod zk-1 --template {{.spec.nodeName}}) --ignore-daemonsets --force --delete-local-data "kubernetes-minion-group-ixsl" cordoned
+kubectl drain $(kubectl get pod zk-1 --template {{.spec.nodeName}}) --ignore-daemonsets --force --delete-local-data
+node "kubernetes-minion-group-ixsl" cordoned
 WARNING: Deleting pods not managed by ReplicationController, ReplicaSet, Job, or DaemonSet: fluentd-cloud-logging-kubernetes-minion-group-ixsl, kube-proxy-kubernetes-minion-group-ixsl; Ignoring DaemonSet-managed pods: node-problem-detector-v0.1-voc74
 pod "zk-1" deleted
 node "kubernetes-minion-group-ixsl" drained