chore: fix some minor issues in the comments

[stringsbuilder]

Description of change

fix some minor issues in the comments

Links to any relevant issues

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Type of change

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• Documentation Fix

How the change has been tested

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Change checklist

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• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have selected the develop branch as the target branch
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked that new and existing unit tests pass locally with my changes

[stringsbuilder]

@howjmay Hi, Could you please review this PR at your convenience? Thank you very much.