docs: clarify the use of shell types

Report by Ondřej Bouda

diff --git a/doc/src/sgml/ref/create_type.sgml b/doc/src/sgml/ref/create_type.sgml
index f9e1297d0b0da8e6855da245bdd37f24bf272503..a6a4644d5904bd51f837485bc0c4707ddf2f27d8 100644 (file)
--- a/doc/src/sgml/ref/create_type.sgml
+++ b/doc/src/sgml/ref/create_type.sgml
@@ -268,7 +268,7 @@ CREATE TYPE name
    placeholder type that has no properties except a name and an owner.  This
    is done by issuing the command CREATE TYPE
    name, with no additional parameters.  Then the
-   I/O functions can be defined referencing the shell type.  Finally,
+   C I/O functions can be defined referencing the shell type.  Finally,
    CREATE TYPE with a full definition replaces the shell entry
    with a complete, valid type definition, after which the new type can be
    used normally.