Use a less ambiguous wording in docstring.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@1861 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/storage/database/manager.py

@@ -263,9 +263,9 @@ class DatabaseManager(object):
 
     def getObjectHistory(self, oid, offset = 0, length = 1):
         """Return a list of serials and sizes for a given object ID.
-        The length specifies the maximum size of such a list. The first serial
-        must be the last serial, and the list must be sorted in descending
-        order. If there is no such object ID in a database, return None."""
+        The length specifies the maximum size of such a list. Result starts
+        with latest serial, and the list must be sorted in descending order.
+        If there is no such object ID in a database, return None."""
         raise NotImplementedError
 
     def getTIDList(self, offset, length, num_partitions, partition_list):