* spam.el (spam-list-of-checks): Don't quote nil and t in

* spam.el (spam-list-of-checks): Don't quote nil and t in
docstrings.  From the elisp manual:

* messcompat.el (message-from-style): do.

* message.el (message-send-mail): do.

* gnus-util.el (gnus-use-byte-compile): do.

* gnus-score.el (gnus-score-lower-thread): do.

* gnus-int.el (gnus-server-unopen-status): do.

* gnus.el (gnus-define-group-parameter, gnus-large-newsgroup)
(large-newsgroup-initial, gnus-install-group-spam-parameters): do.

* gnus-cus.el (gnus-group-customize, gnus-score-parameters)
(gnus-group-parameters): do.

* gnus-art.el (gnus-article-mime-match-handle-function): do.

* mm-decode.el (mm-text-html-renderer): do.