Typo in create_tranform.sgml

It seems there is a redundant word "function" in
doc/ref/create_tranform.sgml. Patch attached.

Best regards,
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese:http://www.sraoss.co.jp
diff --git a/doc/src/sgml/ref/create_transform.sgml b/doc/src/sgml/ref/create_transform.sgml
index d321dad..f44ee89 100644
--- a/doc/src/sgml/ref/create_transform.sgml
+++ b/doc/src/sgml/ref/create_transform.sgml
@@ -113,7 +113,7 @@ CREATE [ OR REPLACE ] TRANSFORM FOR <replaceable>type_name</replaceable> LANGUAG       type
<type>internal</type>and return type <type>internal</type>.  The       actual argument will be of the type for the
transform,and the function       should be coded as if it were.  (But it is not allowed to declare an
 
-       SQL-level function function returning <type>internal</type> without at
+       SQL-level function returning <type>internal</type> without at       least one argument of type
<type>internal</type>.) The actual return       value will be something specific to the language implementation.
</para>