fix: dump generate invalid yaml

[jtherin]

Fixes #412

[kubeflow-bot]

This change is 

[k8s-ci-robot]

Hi @jtherin. Thanks for your PR.

I'm waiting for a kubeflow 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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[PatrickXYS]

@jtherin Thanks for contributing!

I left a few comments

[PatrickXYS]

/ok-to-test

[PatrickXYS]

/lgtm
/approve

[PatrickXYS]

/assign @adrian555

[crobby]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: crobby, PatrickXYS

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