Corrected Some Spelling And Grammatical Errors

[daniel-hutao]

What this PR does / why we need it:

Corrected some spelling and grammatical errors.

Which issue(s) this PR fixes

N/A

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[andreyvelich]

Thank you for your contribution @daniel-hutao!
/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andreyvelich, daniel-hutao

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[coveralls]

Pull Request Test Coverage Report for Build 7471919019

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 42.908%

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Totals
Change from base Build 7423814404:	0.1%
Covered Lines:	3757
Relevant Lines:	8756

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💛 - Coveralls