Docs: typo and clarity updates

[prrao87]

Purpose

I made some minor typo and clarity fixes as I was going through the tutorials (no meaning or conceptual changes). Hope this works!

Also, many thanks for publishing this library and for documenting it so well! Really looking forward to using it more.

Checklist

• I ran rustfmt locally
• I have added the tests to cover my changes.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

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[coveralls]

Pull Request Test Coverage Report for Build 7965778401

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.05%) to 96.614%

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Totals
Change from base Build 7880161745:	0.05%
Covered Lines:	16748
Relevant Lines:	17335

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💛 - Coveralls

[IvanIsCoding]

Thanks!