diff --git a/src/sage/categories/primer.py b/src/sage/categories/primer.py
index 8c7dc0c2b5f..6f492377844 100644
--- a/src/sage/categories/primer.py
+++ b/src/sage/categories/primer.py
@@ -2,10 +2,6 @@
 r"""
 Elements, parents, and categories in Sage: a primer
 
-.. contents::
-   :depth: 2
-   :class: this-will-duplicate-information-and-it-is-still-useful-here
-
 Abstract
 ========
 
diff --git a/src/sage/misc/sagedoc_conf.py b/src/sage/misc/sagedoc_conf.py
index bcf0ec42d3c..e6f8fd9e3db 100644
--- a/src/sage/misc/sagedoc_conf.py
+++ b/src/sage/misc/sagedoc_conf.py
@@ -191,7 +191,7 @@ class SagemathTransform(Transform):
     default_priority = 500
 
     def apply(self):
-        for node in self.document.traverse(nodes.literal_block):
+        for node in self.document.findall(nodes.literal_block):
             if node.get('language') is None and node.astext().startswith('sage:'):
                 node['language'] = 'ipycon'
                 source = node.rawsource