Minor wording change.

James William Pye · James William Pye · commit 66324d442950 · 2010-04-28T07:36:00.000-07:00
diff --git a/postgresql/documentation/driver.txt b/postgresql/documentation/driver.txt
@@ -1705,7 +1705,7 @@ Message Metadata
 ----------------
 
 PostgreSQL messages, `postgresql.message.Message`, are primarily described in three
-parts: the SQL-state code, the main message string, and a mapping defining the
+parts: the SQL-state code, the main message string, and a mapping containing the
 details. The follow attributes are available on message objects:
 
  ``Message.message``
