Fix markup for pg_options_to_table() to report the return column names,

per suggestion from Andrew.

doc/src/sgml/func.sgml

@@ -13386,7 +13386,7 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
       <row>
        <entry><literal><function>pg_options_to_table(<parameter>reloptions</parameter>)</function></literal></entry>
        <entry><type>setof record</type></entry>
-       <entry>get the set of storage option name/value pairs</></entry>
+       <entry>get the set of storage option name/value pairs</entry>
       </row>
       <row>
        <entry><literal><function>pg_tablespace_databases(<parameter>tablespace_oid</parameter>)</function></literal></entry>
@@ -13484,8 +13484,9 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
   </para>
 
   <para>
-   <function>pg_options_to_table</function> returns the set of storage option
-   name/value pairs when passed
+   <function>pg_options_to_table</function> returns the set of storage
+   option name/value pairs
+   (<literal>option_name</>/<literal>option_value</>) when passed
    <structname>pg_class</>.<structfield>reloptions</> or
    <structname>pg_attribute</>.<structfield>attoptions</>.
   </para>