document non-binary case for Boolean and bit-wise operators

[kroening]

This documents the current behavior of the non-binary case of the Boolean operators and the bit-wise operators.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.00%. Comparing base (74d15ae) to head (2407365).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8795      +/-   ##
===========================================
- Coverage    80.01%   80.00%   -0.01%     
===========================================
  Files         1700     1700              
  Lines       188249   188249              
  Branches        73       73              
===========================================
- Hits        150632   150615      -17     
- Misses       37617    37634      +17     

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