Merge pull request #51311 from xingzhou/typo-comment

Automatic merge from submit-queue (batch tested with PRs 51311, 52575, 53169). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix typo

Fixed typo.

Fixed #52136 

**Release note**:
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This commit is contained in:
Kubernetes Submit Queue 2017-09-28 23:18:16 -07:00 committed by GitHub
commit 0df774a121

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