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, 1 insertions, 1 deletions

diff --git a/sphinx/ext/linkcode.py b/sphinx/ext/linkcode.py
index b9c165ca4..6ae828408 100644
--- a/sphinx/ext/linkcode.py
+++ b/sphinx/ext/linkcode.py
@@ -39,7 +39,7 @@ def doctree_read(app: Sphinx, doctree: Node) -> None:
         'js': ['object', 'fullname'],
     }
 
-    for objnode in list(doctree.traverse(addnodes.desc)):
+    for objnode in list(doctree.findall(addnodes.desc)):
         domain = objnode.get('domain')
         uris: Set[str] = set()
         for signode in objnode: