Add a button to the code examples in the doc to show/hide the prompts and output.
diff --git a/Doc/tools/sphinxext/layout.html b/Doc/tools/sphinxext/layout.html
index a256181..8659ef0 100644
--- a/Doc/tools/sphinxext/layout.html
+++ b/Doc/tools/sphinxext/layout.html
@@ -6,6 +6,7 @@
{% endblock %}
{% block extrahead %}
<link rel="shortcut icon" type="image/png" href="{{ pathto('_static/py.png', 1) }}" />
+ <script type="text/javascript" src="{{ pathto('_static/copybutton.js', 1) }}"></script>
{{ super() }}
{% endblock %}
{% block footer %}