code-gen: Prettier min/max

[dweindl]

Print n-ary min/max instead of nested min/max for n>2. More readable.

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 79.06%. Comparing base (167864b) to head (95b7efc).
⚠️ Report is 54 commits behind head on main.

Files with missing lines	Patch %	Lines
python/sdist/amici/cxxcodeprinter.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2909      +/-   ##
==========================================
- Coverage   79.62%   79.06%   -0.56%     
==========================================
  Files         358      358              
  Lines       23033    23035       +2     
  Branches     1581     1581              
==========================================
- Hits        18339    18212     -127     
- Misses       4683     4812     +129     
  Partials       11       11              

Flag	Coverage Δ
cpp	74.98% <80.00%> (+0.01%)	⬆️
cpp_python	33.17% <0.00%> (-0.01%)	⬇️
petab	38.98% <0.00%> (-0.01%)	⬇️
python	73.85% <80.00%> (+0.01%)	⬆️
sbmlsuite-jax	?

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Files with missing lines	Coverage Δ
python/sdist/amici/cxxcodeprinter.py	95.57% <80.00%> (+0.07%)	⬆️

... and 9 files with indirect coverage changes

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