Ensure notebook_extension displays baseclass Renderer assets
@@ -387,7 +387,7 @@ class Renderer(Exporter):
backends = [cls.backend] if cls.backend else []
# Get all the widgets and find the set of required js widget files
- widgets = [wdgt for r in Renderer.__subclasses__()
+ widgets = [wdgt for r in [Renderer]+Renderer.__subclasses__()
for wdgt in r.widgets.values()]
css = list({wdgt.css for wdgt in widgets})
basejs = list({wdgt.basejs for wdgt in widgets})
