message: fix docs accordingly
diff: @@ -140,9 +140,9 @@ for real examples.
  PEM-encoded certificate authority certificates.
  -This values could be obtained via inspecting the kube config file under
  -`clusters.cluster.certificate-authority-data`. For GKE, execute the following
  -command to obtain the value
  +This values could be obtained via inspecting the Kubernetes config file (usually
  +at `~/.kube/config`) under `clusters.cluster.certificate-authority-data`. For
  +GKE, execute the following command to obtain the value
  ```
  gcloud container clusters describe <YOUR_CLUSTER_NAME> \
  @@ -152,7 +152,7 @@ gcloud container clusters describe <YOUR_CLUSTER_NAME> \
  See also
  https://cloud.google.com/kubernetes-engine/docs/how-to/api-server-authentication#environments-without-gcloud
  -for complete docs about GKE without gcloud.
  +for complete docs about GKE without `gcloud`.
  #### `gke`
  