Modified the behavior of AbstractFunctionArray.__array_ufunc__() to allow any instance of AbstactArray that is not a function to be an operand.

[roytsmart]

Previously in this case, the operand also had to have an empty shape, but this change relaxes that requirement.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.82%. Comparing base (61bbc93) to head (e5497a4).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #138   +/-   ##
=======================================
  Coverage   95.81%   95.82%           
=======================================
  Files          84       84           
  Lines       12711    12709    -2     
=======================================
- Hits        12179    12178    -1     
+ Misses        532      531    -1     

Flag	Coverage Δ
unittests	95.82% <100.00%> (+<0.01%)	⬆️

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