Migrate to Node.findall() from Node.traverse()

Node.traverse() was marked as deprecated since docutils-0.18.  Instead
of it, Node.findall() has been added as successor of traverse().

This applies a patch to docutils-0.17 or older to be available
Node.findall() and use it.

1 files changed, 2 insertions, 2 deletions

diff --git a/sphinx/writers/texinfo.py b/sphinx/writers/texinfo.py
index 7551136ff..351aef2f7 100644
--- a/sphinx/writers/texinfo.py
+++ b/sphinx/writers/texinfo.py
@@ -286,7 +286,7 @@ class TexinfoTranslator(SphinxTranslator):
         self.indices = [(add_node_name(name), content)
                         for name, content in self.indices]
         # each section is also a node
-        for section in self.document.traverse(nodes.section):
+        for section in self.document.findall(nodes.section):
             title = cast(nodes.TextElement, section.next_node(nodes.Titular))
             name = title.astext() if title else '<untitled>'
             section['node_name'] = add_node_name(name)
@@ -295,7 +295,7 @@ class TexinfoTranslator(SphinxTranslator):
         """Collect the menu entries for each "node" section."""
         node_menus = self.node_menus
         targets: List[Element] = [self.document]
-        targets.extend(self.document.traverse(nodes.section))
+        targets.extend(self.document.findall(nodes.section))
         for node in targets:
             assert 'node_name' in node and node['node_name']
             entries = [s['node_name'] for s in find_subsections(node)]