trim whitespaces in manifests

Author: makocchi-git

content/en/docs/concepts/policy/pod-security-policy.md

@@ -216,12 +216,17 @@ kubectl-user create -f- <<EOF
 apiVersion: v1
 kind: Pod
 metadata:
-  name:      pause
+  name: pause
 spec:
   containers:
-    - name:  pause
+    - name: pause
       image: k8s.gcr.io/pause
 EOF
+```
+
+The output is similar to this:
+
+```
 Error from server (Forbidden): error when creating "STDIN": pods "pause" is forbidden: unable to validate against any pod security policy: []
 ```
 
@@ -264,12 +269,17 @@ kubectl-user create -f- <<EOF
 apiVersion: v1
 kind: Pod
 metadata:
-  name:      pause
+  name: pause
 spec:
   containers:
-    - name:  pause
+    - name: pause
       image: k8s.gcr.io/pause
 EOF
+```
+
+The output is similar to this
+
+```
 pod "pause" created
 ```
 
@@ -281,14 +291,19 @@ kubectl-user create -f- <<EOF
 apiVersion: v1
 kind: Pod
 metadata:
-  name:      privileged
+  name: privileged
 spec:
   containers:
-    - name:  pause
+    - name: pause
       image: k8s.gcr.io/pause
       securityContext:
         privileged: true
 EOF
+```
+
+The output is similar to this:
+
+```
 Error from server (Forbidden): error when creating "STDIN": pods "privileged" is forbidden: unable to validate against any pod security policy: [spec.containers[0].securityContext.privileged: Invalid value: true: Privileged containers are not allowed]
 ```