[musl] [PATCH] complex: fix comment in cacosh

[Szabolcs Nagy <nsz@port70.net>]

The principal experssions defining acosh and acos are such that

  acosh(z) = +-i acos(z)

where the + is only true on the Im(z)>0 half of the complex plane
(and partly on Im(z)==0 depending on number representation).

fix the comment without expanding on the details.
---
 src/complex/cacosh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/complex/cacosh.c b/src/complex/cacosh.c
index 76127f75..586328ce 100644
--- a/src/complex/cacosh.c
+++ b/src/complex/cacosh.c
@@ -1,6 +1,6 @@
 #include "complex_impl.h"
 
-/* acosh(z) = i acos(z) */
+/* acosh(z) = +-i acos(z) */
 
 double complex cacosh(double complex z)
 {
-- 
2.43.0