diff --git a/doc/manual/source/_static/.hidden b/doc/manual/source/_static/.hidden
new file mode 100644
index 000000000..e69de29bb
diff --git a/doc/testing/source/_static/.hidden b/doc/testing/source/_static/.hidden
new file mode 100644
index 000000000..e69de29bb
diff --git a/doc/tutorial/source/_static/.hidden b/doc/tutorial/source/_static/.hidden
new file mode 100644
index 000000000..e69de29bb
diff --git a/doc/tutorial/source/index.rst b/doc/tutorial/source/index.rst
index cc9fce836..708be4c78 100644
--- a/doc/tutorial/source/index.rst
+++ b/doc/tutorial/source/index.rst
@@ -1,7 +1,7 @@
 .. only:: html or latex
 
 Welcome to ns-3's tutorial!
-=========================
+===========================
 
 This is the *ns-3 tutorial*. Primary documentation for the ns-3 project is
 available in four forms: