gnus-article-prepare
gnus-article-prepare is an autoloaded compiled Lisp function in `gnus-art.el
'.
(gnus-article-prepare ARTICLE &optional ALL-HEADERS HEADER)
Prepare ARTICLE in article mode buffer.
ARTICLE should either be an article number or a Message-ID.
If ARTICLE is an id, HEADER should be the article headers.
If ALL-HEADERS is non-nil, no headers are hidden.