comment-search-backwardcomment-search-backward is a compiled Lisp function in `
newcomment.el'. (comment-search-backward &optional LIMIT NOERROR) Find a comment start between LIMIT and point. Moves point to inside the comment and returns the position of the comment-starter. If no comment is found, moves point to LIMIT and raises an error or returns nil if NOERROR is non-nil. Ensure that `comment-normalize-vars' has been called before you use this.