chore: fix a large number of spelling issues

[pxwanglu]

fix a large number of spelling issues

[cla-bot]

Thank you for your pull request. We require contributors to sign our Contributor License Agreement / Terms and Conditions, and we don't seem to have the users @pxwanglu on file. In order for us to review and merge your code, please sign:

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[cla-bot]

Thank you for your pull request. We require contributors to sign our Contributor License Agreement / Terms and Conditions, and we don't seem to have the users @pxwanglu on file. In order for us to review and merge your code, please sign:

• For individual contribution: our CLA
• for Bounty submission, if you are an individual: our T&C
• for Bounty submission, if you are a company: our T&C
  to get yourself added.

If you already signed one of this document, just wait to be added to the bot config.

[pxwanglu]

Signed.