OK, no idea what is happening, reverting

pelicanconf.py

@@ -32,17 +32,7 @@ DEFAULT_PAGINATION = 100
 PLUGIN_PATHS = ['./pelican-plugins', './plugins-custom']
 PLUGINS = ['dateish', 'extract_toc', 'i18n_subsites', 'summary', 'events-ics','complex_footnotes', 'stream', 'thumbnailer']
 
-MARKDOWN = {
+MD_EXTENSIONS = ['codehilite', 'extra', 'toc']
-    'extension_configs': {
-        'markdown.extensions.codehilite': {'css_class': 'highlight'},
-        'markdown.extensions.extra': {},
-        'markdown.extensions.meta': {},
-        'markdown.extensions.toc': {
-            'marker': '[TOC]',
-        },
-    },
-    'output_format': 'html5',
-}
 
 STATIC_PATHS = ['extra/favicon.ico', 'images', 'pdfs', 'stream']
 EXTRA_PATH_METADATA = {