[hurd, commited 1/2] mach: Fix incoherency between perror and strerror

[Samuel Thibault]

08d2024b4167 ("string: Simplify strerror_r") inadvertently made
__strerror_r print unknown error system in decimal while the original
code was printing it in hexadecimal. perror was kept printing in
hexadecimal in 725eeb4af14c ("string: Use tls-internal on strerror_l"),
let us keep both coherent.

This also fixes a duplicate ':'

Spotted by the libunistring testsuite test-perror2
---
 sysdeps/mach/_strerror.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sysdeps/mach/_strerror.c b/sysdeps/mach/_strerror.c
index b179c440d3..acc00612bb 100644
--- a/sysdeps/mach/_strerror.c
+++ b/sysdeps/mach/_strerror.c
@@ -40,7 +40,7 @@ __strerror_r (int errnum, char *buf, size_t buflen)
 
   if (system > err_max_system || ! __mach_error_systems[system].bad_sub)
     {
-      __snprintf (buf, buflen, "%s: %d", _("Error in unknown error system: "),
+      __snprintf (buf, buflen, "%s%X", _("Error in unknown error system: "),
                  errnum);
       return buf;
     }
-- 
2.35.1