> "Style to be used for `comment-region'.
 > See `comment-styles' for a list of available styles."
 >
 > 1. Put the available styles here.
 >
 > 2. There is no such function or variable as `comment-styles'.

We probably could add two autoload cookies to newcomment.el (I don't
recall why I wanted the one for `comment-empty-lines' once).

martin