From f025fa80595239ee1d6c62293a6a7da0d1c84fcf Mon Sep 17 00:00:00 2001
From: Waylan Limberg <waylan.limberg@icloud.com>
Date: Thu, 17 Sep 2026 10:56:00 -0400
Subject: [PATCH] Ensure py-render codeblock title in properly escaped.

Relates to #1637.
---
 tools/superfences_formaters.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/superfences_formaters.py b/tools/superfences_formaters.py
index 4d99a8df..64a7fe24 100644
--- a/tools/superfences_formaters.py
+++ b/tools/superfences_formaters.py
@@ -11,6 +11,7 @@
 import sys
 from io import StringIO
 from collections import OrderedDict
+from markdown.util import code_escape
 
 
 def yaml_load(stream, loader=yaml.Loader):
@@ -169,7 +170,8 @@ def py_render(src="", language="", class_name=None, options=None, md="", **kwarg
         elif target == 'stdout':
             result_options['title'] = 'Text Written to STDOUT'
         elif target is not None:
-            result_options['title'] = f'Value of `{target}`'
+            # Store title in stash to avoid it being escaped by Pygments.
+            result_options['title'] = md.htmlStash.store(f'Value of <code>{code_escape(target)}</code>')
         
         output = md.preprocessors['fenced_code_block'].highlight(result, output_lang, result_options, md, **kwargs)
         return f'{source}\n<div class="result">{output}</div>'