From 4b77832b9e38c3b8050bf2b628eb24ffdb786d71 Mon Sep 17 00:00:00 2001
From: Markus Unterwaditzer <markus-tarpit+git@unterwaditzer.net>
Date: Wed, 8 Oct 2025 01:12:19 +0200
Subject: [PATCH] Add <details> test to see how many downstream projects honor
 insertion modes

---
 tree-construction/tests20.dat | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff --git a/tree-construction/tests20.dat b/tree-construction/tests20.dat
index 80c57d1..0834a58 100644
--- a/tree-construction/tests20.dat
+++ b/tree-construction/tests20.dat
@@ -840,3 +840,16 @@
 |       <math annotation-xml>
 |         <svg svg>
 |           "x"
+
+#data
+<details name=hello open></details><details name=hello open></details>
+#errors
+#document
+| <html>
+|   <head>
+|   <body>
+|     <details>
+|       name="hello"
+|       open=""
+|     <details>
+|       name="hello"
