Docs fix spelling issues

[nnsW3]

Hello
I found and fixed several minor spelling issues.
Br, elias.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.63%. Comparing base (adaeb54) to head (601989e).
Report is 1 commits behind head on master.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #892   +/-   ##
=======================================
  Coverage   96.63%   96.63%           
=======================================
  Files          19       19           
  Lines        1069     1069           
=======================================
  Hits         1033     1033           
  Misses         36       36           

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[cgewecke]

Thanks again! Everything LGTM apart from comment about the api.md doc change...

[nnsW3]

done

[cgewecke]

Great, thank you. 💯