small docs improvement

[RichardBronosky]

Make cmd1 populate the var for cmd2

Using tee /dev/stderr allows the user to still get output if they copy-pasta the first command. The other changes prepare the HZC variable so it can be used if they copy-pasta the second command.

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[k8s-ci-robot]

Hi @RichardBronosky. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[justinsb]

Hi @RichardBronosky thank you for this! Are you able to sign the CLA? I know it is a little bit of a hassle, but then it applies to all kubernetes projects.

[justinsb]

Looks like my commenting woke up the CLA bot - thanks!

/lgtm

/ok-to-test

[k8s-github-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: justinsb

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[justinsb]

And I really like that tee /dev/stderr trick :-)

[chrislovecnm]

/retest

[k8s-github-robot]

/test all [submit-queue is verifying that this PR is safe to merge]

[k8s-github-robot]

Automatic merge from submit-queue