Ellint coverage

[ckormanyos]

No description provided.

[ckormanyos]

The purpose of this PR is to hit some missing ellint_1() and ellint_2() lines via adding tests and also to annotate some lines discovered that are not intended to be covered.

[codecov]

Codecov Report

Attention: Patch coverage is 96.40288% with 5 lines in your changes missing coverage. Please review.

Project coverage is 98.5%. Comparing base (d9dc532) to head (43525f2).

Additional details and impacted files

@@            Coverage Diff            @@
##           develop    #666     +/-   ##
=========================================
+ Coverage     98.3%   98.5%   +0.3%     
=========================================
  Files          223     223             
  Lines        16112   16176     +64     
  Branches      1776    1789     +13     
=========================================
+ Hits         15823   15931    +108     
+ Misses         289     245     -44     

Files	Coverage Δ
include/boost/decimal/detail/cmath/cos.hpp	100.0% <100.0%> (ø)
include/boost/decimal/detail/cmath/ellint_1.hpp	100.0% <100.0%> (+6.3%)	⬆️
include/boost/decimal/detail/cmath/ellint_2.hpp	100.0% <100.0%> (+6.0%)	⬆️
...de/boost/decimal/detail/cmath/impl/ellint_impl.hpp	100.0% <100.0%> (+13.4%)	⬆️
test/compare_dec128_and_fast.cpp	69.9% <ø> (+16.2%)	⬆️
test/test_asin.cpp	100.0% <ø> (+3.3%)	⬆️
test/test_ellint_1.cpp	100.0% <100.0%> (ø)
test/test_ellint_2.cpp	100.0% <100.0%> (ø)
...clude/boost/decimal/detail/cmath/impl/sin_impl.hpp	62.8% <50.0%> (ø)
include/boost/decimal/detail/cmath/sin.hpp	92.2% <85.0%> (-4.5%)	⬇️

... and 1 file with indirect coverage changes

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[ckormanyos]

Better, good enough to merge but we will finish even more later