If the page range is larger than a given size, the whole range is not
provided and a compact form is returned instead, e.g. for a paginator
with 50 pages, if page 43 were the current page, the output, with the
default arguments, would be:
1, 2, …, 40, 41, 42, 43, 44, 45, 46, …, 49, 50.