(gnus-make-format-preserve-properties)

(gnus-make-format-preserve-properties)
(gnus-xmas-format, gnus-parse-simple-format): Preserve text
properties also on XEmacs.  `gnus-xmas-format' is like format but
preserves text properties on XEmacs (though it only understands
simple format specs).  The variable
`gnus-make-format-preserve-properties' controls whether the
function is used, and is checked in `gnus-parse-simple-format'.
Patch by Paul Moore <gustav@morpheus.demon.co.uk>.