docs: explicit wording to clarify correspondence between `IS NOT DISTINCT FROM` ...

diff --git a/docs/basic/from_pg2.rst b/docs/basic/from_pg2.rst
index 6f5e375afc908926502847836e3405a976c169a2..ef78bb381277a8f3011e655f8b698140d98f3773 100644 (file)
--- a/docs/basic/from_pg2.rst
+++ b/docs/basic/from_pg2.rst
@@ -282,8 +282,8 @@ Testing in psql:
     LINE 1: select 10 is 10;
                          ^
 
-What you can do instead is to use the `IS DISTINCT FROM operator`__, which
-will gladly accept a placeholder::
+What you can do instead is to use :sql:`IS NOT DISTINCT FROM %s` in place of
+:sql:`IS %s` (please pay attention to the awkwardly reversed :sql:`NOT`)::
 
     >>> conn.execute("SELECT * FROM foo WHERE field IS NOT DISTINCT FROM %s", [None])