change iteration more ideomatic

[scholarsmate]

No description provided.

[codecov-commenter]

Codecov Report

Merging #156 (40f5f04) into main (6c7cbb2) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #156      +/-   ##
==========================================
+ Coverage   92.41%   92.45%   +0.03%     
==========================================
  Files          17       17              
  Lines        1555     1563       +8     
==========================================
+ Hits         1437     1445       +8     
  Misses        118      118              

Impacted Files	Coverage Δ
src/lib/visit.cpp	100.00% <100.00%> (ø)
src/tests/omega_test.cpp	100.00% <100.00%> (ø)

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