New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/pull/44529#issuecomment-1599471459

Comment:
musl is this single failure:
```
2023-06-20T02:42:42.2859874Z ___________________ TestComplexFunctions.test_against_cmath ____________________
2023-06-20T02:42:42.2860557Z [gw1] linux -- Python 3.11.4 /usr/bin/python3
2023-06-20T02:42:42.2919785Z 
2023-06-20T02:42:42.2922623Z self = <numpy.core.tests.test_umath.TestComplexFunctions object at 0x7f525a4471d0>
2023-06-20T02:42:42.2925068Z 
2023-06-20T02:42:42.2927330Z     def test_against_cmath(self):
2023-06-20T02:42:42.2929736Z         import cmath
2023-06-20T02:42:42.2932080Z     
2023-06-20T02:42:42.2934650Z         points = [-1-1j, -1+1j, +1-1j, +1+1j]
2023-06-20T02:42:42.2937220Z         name_map = {'arcsin': 'asin', 'arccos': 'acos', 'arctan': 'atan',
2023-06-20T02:42:42.2940138Z                     'arcsinh': 'asinh', 'arccosh': 'acosh', 'arctanh': 'atanh'}
2023-06-20T02:42:42.2942626Z         atol = 4*np.finfo(complex).eps
2023-06-20T02:42:42.2945045Z         for func in self.funcs:
2023-06-20T02:42:42.2947527Z             fname = func.__name__.split('.')[-1]
2023-06-20T02:42:42.2950099Z             cname = name_map.get(fname, fname)
2023-06-20T02:42:42.2952604Z             try:
2023-06-20T02:42:42.2954975Z                 cfunc = getattr(cmath, cname)
2023-06-20T02:42:42.2957354Z             except AttributeError:
2023-06-20T02:42:42.2959699Z                 continue
2023-06-20T02:42:42.2962246Z             for p in points:
2023-06-20T02:42:42.2964704Z                 a = complex(func(np.complex_(p)))
2023-06-20T02:42:42.2967207Z                 b = cfunc(p)
2023-06-20T02:42:42.2969730Z >               assert_(abs(a - b) < atol, "%s %s: %s; cmath: %s" % (fname, p, a, b))
2023-06-20T02:42:42.2972367Z E               AssertionError: arccosh (-1-1j): (-1.0612750619050357+2.2370357592874117j); cmath: (1.0612750619050357-2.237035759287412j)
2023-06-20T02:42:42.2974705Z 
2023-06-20T02:42:42.2976981Z a          = (-1.0612750619050357+2.2370357592874117j)
2023-06-20T02:42:42.2979401Z atol       = 8.881784197001252e-16
2023-06-20T02:42:42.2981835Z b          = (1.0612750619050357-2.237035759287412j)
2023-06-20T02:42:42.2984234Z cfunc      = <built-in function acosh>
2023-06-20T02:42:42.2986844Z cmath      = <module 'cmath' from '/usr/lib/python3.11/lib-dynload/cmath.cpython-311-x86_64-linux-musl.so'>
2023-06-20T02:42:42.2989329Z cname      = 'acosh'
2023-06-20T02:42:42.2991685Z fname      = 'arccosh'
2023-06-20T02:42:42.2992415Z func       = <ufunc 'arccosh'>
2023-06-20T02:42:42.2993001Z name_map   = {'arccos': 'acos', 'arccosh': 'acosh', 'arcsin': 'asin', 'arcsinh': 'asinh', ...}
2023-06-20T02:42:42.2993512Z p          = (-1-1j)
2023-06-20T02:42:42.2993981Z points     = [(-1-1j), (-1+1j), (1-1j), (1+1j)]
2023-06-20T02:42:42.2994496Z self       = <numpy.core.tests.test_umath.TestComplexFunctions object at 0x7f525a4471d0>
2023-06-20T02:42:42.2994903Z 
2023-06-20T02:42:42.2995196Z numpy/core/tests/test_umath.py:4161: AssertionError
```
Can reproduce with:
```
$ python -c 'import cmath, numpy; print(cmath.acosh(-1-1j),numpy.arccosh(-1-1j))'
(1.0612750619050357-2.237035759287412j) (-1.0612750619050357+2.2370357592874117j)
```
Indeed this is "incorrect" since it should choose a branch  with positive real part (i.e `cmath` output is ok, `numpy` output is incorrect).

Note this is also wrong in the 1.24.3 that is in void repo (but only on musl).