Fix unexpected line end in override flags

[dtaniwaki]

What type of PR is this?
/kind bug

What this PR does / why we need it:
#70470 caused a bug in bash completion described in #80797.

Which issue(s) this PR fixes:
Fixes #80797

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Fixed the bash completion error with override flags.

[k8s-ci-robot]

Hi @dtaniwaki. Thanks for your PR.

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[dtaniwaki]

@liggitt The PR #70470 I made introduced a bug with override flags. Could you review this bug fix PR?

[dtaniwaki]

/assign @smarterclayton

[liggitt]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dtaniwaki, liggitt

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