trailing whitespaces

src/ZODB/Connection.py

@@ -321,10 +321,10 @@ class Connection(ExportImport, object):
                 # get back here.
         else:
             self.opened = None
-            
+
         am = self._db._activity_monitor
         if am is not None:
-            am.closedConnection(self)        
+            am.closedConnection(self)
 
     def db(self):
         """Returns a handle to the database this connection belongs to."""