From 0ec9f0e0e541dd004e531c385ba887bca3afef2b Mon Sep 17 00:00:00 2001
From: Justin Lin <justin.sdk@gmail.com>
Date: Mon, 22 Nov 2021 09:46:34 +0800
Subject: [PATCH] update doc

---
 docs/lib3x-polyline_join.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/lib3x-polyline_join.md b/docs/lib3x-polyline_join.md
index 46bfc6a8..5a6c37ed 100644
--- a/docs/lib3x-polyline_join.md
+++ b/docs/lib3x-polyline_join.md
@@ -2,6 +2,8 @@
 
 Place a join on each point. Hull each pair of joins and union all convex hulls.
 
+**Since:** 3.2
+
 ## Parameters
 
 - `points` : a list of points.