acos.s fix: use the formula acos(x) = atan2(sqrt(1-x),sqrt(1+x))

[musl] / src / string / wcsncasecmp_l.c

#include <wchar.h>

int wcsncasecmp_l(const wchar_t *l, const wchar_t *r, size_t n, locale_t locale)
{
        return wcsncasecmp(l, r, n);
}