Cleanup: add/remove apostrophes; remove backtick

[mbrukman]

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What does this PR do?

Add apostrophes to "it's" where the indended use is "it is" instead of "its" (possessive) and vice versa, remove the apostrophe where the intended use is possessive.

Remove unnecessary backtick within a word (typo).

Checklist

• [x] This PR fixes a minor issue (e.g.: typo or small bug) or improves the docs (you can dismiss the other checks if that's the case).
• [ ] This change is discussed in a Github issue/ discussion (please add a link).
• [ ] The documentation and docstrings adhere to the documentation guidelines.
• [ ] This change includes necessary high-coverage tests. (No quality testing = no merge!)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 0.00%. Comparing base (2c7d7cd) to head (499cd5a). Report is 31 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #3920       +/-   ##
==========================================
- Coverage   60.43%   0.00%   -60.44%     
==========================================
  Files         105      97        -8     
  Lines       13263   12956      -307     
==========================================
- Hits         8015       0     -8015     
- Misses       5248   12956     +7708     

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