--- a/cubicweb/server/schema2sql.py	Tue Oct 09 16:24:12 2018 +0200
+++ b/cubicweb/server/schema2sql.py	Mon Oct 29 10:04:31 2018 +0100
@@ -54,9 +54,8 @@
     """Return a predictable-but-size-constrained name for an index on `table(*columns)`, using an
     md5 hash.
     """
-    return '%s%s' % (prefix, md5((table +
-                                  ',' +
-                                  ','.join(sorted(columns))).encode('ascii')).hexdigest())
+    return '%s%s' % (prefix, md5((
+        table + ',' + ','.join(sorted(columns))).encode('ascii')).hexdigest())
 
 
 def rschema_has_table(rschema, skip_relations):