Require complete tagging in emacs hints at bottom of file.

Author: Thomas G. Lockhart

doc/src/sgml/ports.sgml

@@ -326,7 +326,7 @@ Others listed here do not provide sufficient library support for an attempt.
 <!-- Keep this comment at the end of the file
 Local variables:
 mode: sgml
-sgml-omittag:t
+sgml-omittag:nil
 sgml-shorttag:t
 sgml-minimize-attributes:nil
 sgml-always-quote-attributes:t