Merge pull request #18599 from smarterclayton/abstract_explain

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hack/test-cmd.sh

@@ -1291,6 +1291,17 @@ __EOF__
   kubectl delete all -l app=cassandra "${kube_flags[@]}"
 
 
+  ###########
+  # Explain #
+  ###########
+
+  kube::log::status "Testing kubectl(${version}:explain)"
+  kubectl explain pods
+  # shortcuts work
+  kubectl explain po
+  kubectl explain po.status.message
+
+
   ###########
   # Swagger #
   ###########