*: fix some typo and mistake comments

[liupan1111]

What problem does this PR solve?

Issue Number: Ref #4399

What is changed and how does it work?

Check List

Tests

• Unit test

[ti-chi-bot]

Hi @liupan1111. Thanks for your PR.

I'm waiting for a tikv 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.42%. Comparing base (06ae8ba) to head (8b4ff95).
⚠️ Report is 46 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10099      +/-   ##
==========================================
- Coverage   78.44%   78.42%   -0.03%     
==========================================
  Files         503      518      +15     
  Lines       67176    69438    +2262     
==========================================
+ Hits        52699    54457    +1758     
- Misses      10653    11030     +377     
- Partials     3824     3951     +127     

Flag	Coverage Δ
unittests	78.42% <100.00%> (-0.03%)	⬇️

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JmPotato, rleungx

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Details

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• OWNERS [JmPotato,rleungx]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-12-24 02:27:17.650109796 +0000 UTC m=+2217582.463887358: ☑️ agreed by rleungx.
• 2025-12-24 07:30:28.086574405 +0000 UTC m=+2235772.900351977: ☑️ agreed by JmPotato.

[ti-chi-bot]

@liupan1111: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-unit-test-next-gen-1	8b4ff95	link	true	/test pull-unit-test-next-gen-1

Full PR test history. Your PR dashboard.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.