docs: clarify plpython SD and GD dictionary behavior

Reported-by: Adam Bielański
Discussion: https://postgr.es/m/153484305538.1370.7605856225879294548@wrigleys.postgresql.org

Backpatch-through: 9.3

diff --git a/doc/src/sgml/plpython.sgml b/doc/src/sgml/plpython.sgml
index d086ddf6ca171aa02094462259f93cefc704bc4e..60a5907464031557e03b74b7a1db4b5ca0d38d50 100644 (file)
--- a/doc/src/sgml/plpython.sgml
+++ b/doc/src/sgml/plpython.sgml
@@ -768,9 +768,9 @@ SELECT * FROM multiout_simple_setof(3);
   Sharing Data
   
    The global dictionary SD is available to store
-   data between function calls.  This variable is private static data.
+   private data between repeated calls to the same function.
    The global dictionary GD is public data,
-   available to all Python functions within a session.  Use with
+   that is available to all Python functions within a session;  use with
    care.global data
    in PL/Python