correct tap transformer calculation

[jd-lara]

closes #1033

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (42be5d6) 85.35% compared to head (f34e9aa) 85.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1034      +/-   ##
==========================================
- Coverage   85.35%   85.33%   -0.03%     
==========================================
  Files         169      169              
  Lines        7649     7659      +10     
==========================================
+ Hits         6529     6536       +7     
- Misses       1120     1123       +3     

Flag	Coverage Δ
unittests	85.33% <66.66%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/parsers/power_models_data.jl	91.38% <66.66%> (-0.95%)	⬇️

... and 2 files with indirect coverage changes

[rodrigomha]

LGTM