fix date format identifies '\n' as invalid separator (#4046)

[ti-chi-bot]

This is an automated cherry-pick of #4046

What problem does this PR solve?

Issue Number: close #4036

Problem Summary:

fix date formate identifies '\n' is invalid separator

What is changed and how it works?

Check List

Tests

• Unit test

Release note

fix date format identifies '\n' as invalid separator

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• guo-shaoge
• windtalker

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[mengxin9014]

/run-all-tests

[windtalker]

LGTM

[mengxin9014]

/merge

[ti-chi-bot]

@mengxin9014: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 7a7da84

[ti-chi-bot]

@ti-chi-bot: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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