From e6f00370eebc7f812b44cf38d7bcb7000df06f5e Mon Sep 17 00:00:00 2001
From: Marius Balteanu <marius.balteanu@zitec.com>
Date: Wed, 30 Apr 2025 22:40:18 +0000
Subject: [PATCH] Fixes broken references for multiple footnote usage (#42648).

git-svn-id: https://svn.redmine.org/redmine/trunk@23726 e93f8b46-1217-0410-a6f0-8f06a7374b81
---
 .../common_mark/sanitization_filter.rb               |  2 +-
 .../common_mark/sanitization_filter_test.rb          | 12 ++++++++----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/lib/redmine/wiki_formatting/common_mark/sanitization_filter.rb b/lib/redmine/wiki_formatting/common_mark/sanitization_filter.rb
index 584df9e0d..ed9bfd83f 100644
--- a/lib/redmine/wiki_formatting/common_mark/sanitization_filter.rb
+++ b/lib/redmine/wiki_formatting/common_mark/sanitization_filter.rb
@@ -105,7 +105,7 @@ module Redmine
             node = env[:node]
             return unless node.name == "a"
             return unless node.has_attribute?("id")
-            return if node.name == "a" && node["id"] =~ /\Afnref-\d+\z/
+            return if node.name == "a" && node["id"] =~ /\Afnref(-\d+){1,2}\z/
 
             node.remove_attribute("id")
           }
diff --git a/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb b/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb
index 0918f7fc2..09ef58dd0 100644
--- a/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb
+++ b/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb
@@ -47,10 +47,14 @@ if Object.const_defined?(:Commonmarker)
     end
 
     def test_should_support_footnotes
-      input = %(<a href="#fn-1" id="fnref-1">foo</a>)
-      assert_equal input, filter(input)
-      input = %(<ol><li id="fn-1">footnote</li></ol>)
-      assert_equal input, filter(input)
+      [
+        %(<a href="#fn-1" id="fnref-1">foo</a>),
+        %(<a href="#fn-1" id="fnref-1-2">foo</a>),
+        %(<ol><li id="fn-1">footnote</li></ol>),
+      ].each do | input |
+        assert_equal input, filter(input)
+        assert_equal input, filter(input)
+      end
     end
 
     def test_should_remove_invalid_ids