asciidoc: Add fix for Python 3.12

general/prog/python-modules/asciidoc.xml

@@ -83,6 +83,16 @@
     <sect3 role="installation">
       <title>Installation of Asciidoc</title>
 
+      <!-- https://github.com/asciidoc-py/asciidoc-py/pull/267 -->
+      <para>
+        Fix an issue causing thouands lines of
+        <quote><computeroutput>invalid escape sequence</computeroutput></quote>
+        warnings outputted when generating the documentation of some
+        packages with Asciidoc and Python 3.12 or later:
+      </para>
+
+<screen><userinput>sed "/self.separator =/s/'/r'/" -i asciidoc/asciidoc.py</userinput></screen>
+
       <para>
         Build the module:
       </para>