Merge pull request #11583 from thockin/docs-tick-tick-tick

Collected markedown fixes around syntax.

docs/user-guide/debugging-services.md

@@ -195,7 +195,6 @@ or:
 
 ```console
 u@pod$ echo $HOSTNAMES_SERVICE_HOST
-
 ```
 
 So the first thing to check is whether that `Service` actually exists:

docs/user-guide/kubeconfig-file.md

@@ -151,7 +151,6 @@ users:
   myself:
     username: admin
     password: secret
-
 ```
 
 and a kubeconfig file that looks like this

docs/user-guide/persistent-volumes/README.md

@@ -75,7 +75,6 @@ They just know they can rely on their claim to storage and can manage its lifecy
 Claims must be created in the same namespace as the pods that use them.
 
 ```console
-
 $ kubectl create -f docs/user-guide/persistent-volumes/claims/claim-01.yaml
 
 $ kubectl get pvc