[Backport release-1.11] [python/c++] Typo fixes / nits

[johnkerl]

Manually backport #2596 to release-1.11

#2596 (comment)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.24%. Comparing base (e7cfb77) to head (1bcf041).
Report is 2 commits behind head on release-1.11.

Additional details and impacted files

@@              Coverage Diff              @@
##           release-1.11    #2613   +/-   ##
=============================================
  Coverage         90.24%   90.24%           
=============================================
  Files                37       37           
  Lines              4038     4038           
=============================================
  Hits               3644     3644           
  Misses              394      394           

Flag	Coverage Δ
python	90.24% <100.00%> (ø)

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Components	Coverage Δ
python_api	90.24% <100.00%> (ø)
libtiledbsoma	∅ <ø> (∅)