diff -r 9056a41d91ba -r 85416b43310a cubicweb/server/sqlutils.py
--- a/cubicweb/server/sqlutils.py	Fri Mar 10 18:21:22 2017 +0100
+++ b/cubicweb/server/sqlutils.py	Fri Mar 10 18:23:29 2017 +0100
@@ -173,8 +173,8 @@
 
 
 class ConnectionWrapper(object):
-    """handle connection to the system source, at some point associated to a
-    :class:`Session`
+    """Wrap a connection to the system source's database, attempting to handle
+    automatic reconnection.
     """
 
     # since 3.19, we only have to manage the system source connection