Remove excess Spaces (#11106)

content/en/docs/tasks/administer-cluster/dns-custom-nameservers.md

@@ -356,7 +356,7 @@ The complete Corefile with the default plugins:
 .:53 {
         errors
         health
-        kubernetes cluster.local  in-addr.arpa ip6.arpa {
+        kubernetes cluster.local in-addr.arpa ip6.arpa {
            upstream  8.8.8.8 8.8.4.4
            pods insecure
            fallthrough in-addr.arpa ip6.arpa

content/en/docs/tasks/administer-cluster/extended-resource-node.md

@@ -112,7 +112,7 @@ number of dongles. See
 ## Discussion
 
 Extended resources are similar to memory and CPU resources. For example,
-just as  a Node has a certain amount of memory and CPU to be shared by all components
+just as a Node has a certain amount of memory and CPU to be shared by all components
 running on the Node, it can have a certain number of dongles to be shared
 by all components running on the Node. And just as application developers
 can create Pods that request a certain amount of memory and CPU, they can

content/en/docs/tasks/administer-cluster/network-policy-provider/romana-network-policy.md

@@ -14,7 +14,7 @@ This page shows how to use Romana for NetworkPolicy.
 
 {{% capture prerequisites %}}
 
-Complete steps 1, 2, and 3 of  the [kubeadm getting started guide](/docs/getting-started-guides/kubeadm/).
+Complete steps 1, 2, and 3 of the [kubeadm getting started guide](/docs/getting-started-guides/kubeadm/).
 
 {{% /capture %}}