--- a/src/pyams_content_es/site.py	Wed Sep 19 10:31:36 2018 +0200
+++ b/src/pyams_content_es/site.py	Wed Sep 19 10:49:04 2018 +0200
@@ -12,20 +12,16 @@
 
 __docformat__ = 'restructuredtext'
 
-
-# import standard library
 import transaction
 
-# import interfaces
 from pyams_content_es.interfaces import IContentIndexerUtility, INDEXER_NAME, IDocumentIndexTarget
-# import packages
 from pyams_content_es.utility import ContentIndexerUtility
 from pyams_utils.container import find_objects_providing
 from pyams_utils.interfaces.site import ISiteGenerations
 from pyams_utils.registry import utility_config, set_local_registry, query_utility
 from pyams_utils.site import check_required_utilities, site_factory
 
-REQUIRED_UTILITIES = ((IContentIndexerUtility, '', ContentIndexerUtility, INDEXER_NAME), )
+REQUIRED_UTILITIES = ((IContentIndexerUtility, '', ContentIndexerUtility, INDEXER_NAME),)
 
 
 @utility_config(name='PyAMS content indexer', provides=ISiteGenerations)