Doc: fix broken markup.

tglsfdc · tglsfdc · commit eb2a0e00b18a · 2018-04-06T20:54:52.000-04:00
Commit 3d956d9 was apparently not checked against HEAD's doc toolchain. Per buildfarm.
diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml
@@ -3038,7 +3038,7 @@ VALUES ('Albany', NULL, NULL, 'NY');
 
    <para>
     Partitions can also be foreign tables, although they have some limitations
-    that normal tables do not; see <xref linkend="sql-createforeigntable"> for
+    that normal tables do not; see <xref linkend="sql-createforeigntable"/> for
     more information.
    </para>
 
