Merge to Master for 1.92

[mborland]

Deadline is today, kind of slipped my mind

[mborland]

Strangely the macOS runs are starting to fail consistently with:

====== BEGIN OUTPUT ======
Error at cubic_roots_test.cpp:test_zero_coefficients:44
  Condition 'nan == -1' is not satisfied:
  Expected =  nan = nan = nan
  Computed =  -1.000000 = -1.000000e+00 = -0x1p+0
Error at cubic_roots_test.cpp:test_zero_coefficients:45
  The computed value should be a nan, but is instead -1.000000 = -1.000000e+00 = -0x1p+0
Error at cubic_roots_test.cpp:test_zero_coefficients:50
  Condition 'nan == 1' is not satisfied:
  Expected =  nan = nan = nan
  Computed =  1.000000 = 1.000000e+00 = 0x1p+0
Error at cubic_roots_test.cpp:test_zero_coefficients:51
  The computed value should be a nan, but is instead 1.000000 = 1.000000e+00 = 0x1p+0
libc++abi: terminating due to uncaught exception of type std::domain_error: Error in CHECK_ULP_CLOSE: Expected value cannot be a nan. Callsite: cubic_roots_test.cpp:test_zero_coefficients:57.

EXIT STATUS: 134
====== END OUTPUT ======

It's been >4 years since the last commit to the cubic roots code?

[mborland]

Mac failures are fixed in #1417, so I will wait for that to be merged so that it can automatically be populated into master

[codecov]

Codecov Report

❌ Patch coverage is 98.10496% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.39%. Comparing base (e6fb7d3) to head (600627d).
⚠️ Report is 16 commits behind head on master.

Files with missing lines	Patch %	Lines
include/boost/math/distributions/students_t.hpp	92.77%	6 Missing ⚠️
...tions/detail/hypergeometric_pFq_checked_series.hpp	87.50%	2 Missing ⚠️
test/git_issue_1412_pt_2.cpp	50.00%	2 Missing ⚠️
include/boost/math/distributions/find_location.hpp	83.33%	1 Missing ⚠️
include/boost/math/special_functions/beta.hpp	95.45%	1 Missing ⚠️
include/boost/math/tools/cubic_roots.hpp	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1415      +/-   ##
==========================================
+ Coverage   95.34%   95.39%   +0.05%     
==========================================
  Files         825      828       +3     
  Lines       68160    68931     +771     
==========================================
+ Hits        64986    65759     +773     
+ Misses       3174     3172       -2     

Files with missing lines	Coverage Δ
include/boost/math/constants/constants.hpp	100.00% <100.00%> (ø)
include/boost/math/distributions/arcsine.hpp	100.00% <100.00%> (+8.67%)	⬆️
include/boost/math/distributions/binomial.hpp	98.00% <100.00%> (+11.44%)	⬆️
include/boost/math/distributions/cauchy.hpp	100.00% <100.00%> (+16.45%)	⬆️
include/boost/math/distributions/chi_squared.hpp	98.13% <100.00%> (+7.30%)	⬆️
include/boost/math/distributions/extreme_value.hpp	98.83% <ø> (+17.68%)	⬆️
...lude/boost/math/distributions/inverse_gaussian.hpp	85.33% <100.00%> (+1.19%)	⬆️
include/boost/math/distributions/non_central_f.hpp	90.73% <100.00%> (+2.76%)	⬆️
include/boost/math/interpolators/pchip.hpp	89.79% <100.00%> (+0.43%)	⬆️
include/boost/math/octonion.hpp	70.76% <ø> (ø)
... and 35 more

... and 15 files with indirect coverage changes

---

Continue to review full report in Codecov by Harness.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e6fb7d3...600627d. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[mborland]

#1417 ran green and #1416 better tests libc++'s integration issue so I think we are going to be good now