Simply dummy text of the printing and typesetting industry. Simply Text has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. There are many variations of passages of Simply Text available, but the majority have suffered alteration in some form, by injected humour, or randomised words which don't look even slightly believable. If you are going to use a passage of Simply Text, you need to be sure there isn't anything embarrassing hidden in the middle of text.