Merge pull request #8853 from jpmckinney/markdown-locale-heading-3.x

i18n: Locale transform: Change heading syntax to work for both RST and Markdown

sphinx/transforms/i18n.py

@@ -263,7 +263,7 @@ def apply(self, **kwargs: Any) -> None:
             # see: http://docutils.sourceforge.net/docs/ref/doctree.html#structural-subelements
             if isinstance(node, nodes.title):
                 # This generates: <section ...><title>msgstr</title></section>
-                msgstr = msgstr + '\n' + '-' * len(msgstr) * 2
+                msgstr = msgstr + '\n' + '=' * len(msgstr) * 2
 
             patch = publish_msgstr(self.app, msgstr, source,
                                    node.line, self.config, settings)