getgroups(2) first appeared in POSIX.1-1988.[1]

[1] IEEE Std 1003.1-1988, Section 4.2.3 "Get Supplementary Group IDs".

Signed-off-by: Seth McDonald <redacted>
---
 man/man2/getgroups.2 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/man/man2/getgroups.2 b/man/man2/getgroups.2
index 78142e3bbd04..260107d24af0 100644
--- a/man/man2/getgroups.2
+++ b/man/man2/getgroups.2

@@ -157,7 +157,9 @@ .SH STANDARDS
 .SH HISTORY
 .TP
 .BR getgroups ()
-SVr4, 4.3BSD, POSIX.1-2001.
+4.3BSD,
+SVr4,
+POSIX.1-1988.
 .TP
 .BR setgroups ()
 SVr4, 4.3BSD.

-- 
2.47.3