From f72b94bdb68b6ebc16e8c9aa70ec9a1a9f259efc Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 25 Dec 2024 11:37:37 +0900
Subject: [PATCH] [DOC] Fix duplicate entries

A tentative workaround for duplicate entries in "Class and Module
Index".
---
 lib/rdoc/generator/template/darkfish/_sidebar_classes.rhtml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/rdoc/generator/template/darkfish/_sidebar_classes.rhtml b/lib/rdoc/generator/template/darkfish/_sidebar_classes.rhtml
index d3d8da4017..06b5542fa1 100644
--- a/lib/rdoc/generator/template/darkfish/_sidebar_classes.rhtml
+++ b/lib/rdoc/generator/template/darkfish/_sidebar_classes.rhtml
@@ -18,6 +18,7 @@
     solo = top.one? {|klass| klass.display?}
     traverse = proc do |klasses| -%>
   <ul class="link-list">
+      <%- klasses.uniq!(&:full_name) -%>
       <%- klasses.each do |index_klass| -%>
         <%- if children = all_classes[index_klass.full_name] -%>
   <li><details<% if solo; solo = false %> open<% end %>><summary><% link.call(index_klass) %></summary>