Remove dots from short descriptions

[oscr]

When running kustomize some of the (short command) descriptions end with period while others don't.

Here is the output from the current master branch build

Available Commands:
  build                     Build a kustomization target from a directory or URL.
  cfg                       Commands for reading and writing configuration.
  completion                Generate shell completion script
  create                    Create a new kustomization in the current directory
  edit                      Edits a kustomization file
  fn                        Commands for running functions against configuration.
  help                      Help about any command
  version                   Prints the kustomize version

As a reference kubectl mostly doesn't use periods.

Basic Commands (Beginner):
  create          Create a resource from a file or from stdin
  expose          Take a replication controller, service, deployment or pod and expose it as a new Kubernetes service
  run             Run a particular image on the cluster
  set             Set specific features on objects
(...)

[natasha41575]

/lgtm /approve

[k8s-ci-robot]

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