Fix doc typo: unicode_assigned() return type.

Reported-by: Hironobu SUZUKI
Discussion: https://postgr.es/m/5dd88820-bb00-4b90-904b-738ea2e4ee2e@interdb.jp
Backpatch-through: 17

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index cdde647513563fc6742b535f119bcd2842b558ce..5dd95d73a1af83d26a4c5e5c4122db4335e1a92c 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -2910,7 +2910,7 @@ SELECT NOT(ROW(table.*) IS NOT NULL) FROM TABLE; -- detect at least one null in
          <primary>unicode_assigned</primary>
         </indexterm>
         <function>unicode_assigned</function> ( <type>text</type> )
-        <returnvalue>text</returnvalue>
+        <returnvalue>boolean</returnvalue>
        </para>
        <para>
         Returns <literal>true</literal> if all characters in the string are