Update Objects/complexobject.c

Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>

Author: serhiy-storchaka

Objects/complexobject.c

@@ -331,8 +331,8 @@ _Py_c_pow(Py_complex a, Py_complex b)
         r.real = len*cos(phase);
         r.imag = len*sin(phase);
 
-        /* Discard errno set by the math functions above: cos() and sin()
-           set EDOM for an infinite phase.  ERANGE is recovered below. */
+        /* Don't rely on errno set by the math functions above, for
+           example cos() and sin() set EDOM for an infinite phase. */
         errno = 0;
         if (isfinite(a.real) && isfinite(a.imag)
             && isfinite(b.real) && isfinite(b.imag))