bpo-35603: Add a note on difflib table header interpreted as HTML (GH-11439)
(cherry picked from commit c78dae8d2b890d487e428dce00c7f600612cce7b)
Co-authored-by: Xtreak <tir.karthi@gmail.com>
diff --git a/Doc/library/difflib.rst b/Doc/library/difflib.rst
index e245ab8..c2a19dc 100644
--- a/Doc/library/difflib.rst
+++ b/Doc/library/difflib.rst
@@ -127,6 +127,10 @@
the next difference highlight at the top of the browser without any leading
context).
+ .. note::
+ *fromdesc* and *todesc* are interpreted as unescaped HTML and should be
+ properly escaped while receiving input from untrusted sources.
+
.. versionchanged:: 3.5
*charset* keyword-only argument was added. The default charset of
HTML document changed from ``'ISO-8859-1'`` to ``'utf-8'``.