fix typos and upstream library.sh changes

[upodroid]

Part of https://github.com/knative/infra/issues/134

I'm putting this in a separate branch so the changes can be synced by knobots and avoid shipping this to other repos via go module.

Will merge this to main once all repos have been fixed.

/cc @kvmware @evankanderson

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[krsna-m]

/lgtm /hold unhold when ready