comment.go
func newComment(ln *line, rslt *result, src *source, parent element, opts *Options) *comment {
	return &comment{
		elementBase: newElementBase(ln, rslt, src, parent, opts),
	}
}
func newComment(ln *line, rslt *result, src *source, parent element, opts *Options) *comment {
	return &comment{
		elementBase: newElementBase(ln, rslt, src, parent, opts),
	}
}
// newComment creates and returns a comment.