Colin Baxter <m43cap@yandex.com> writes:

> 1. emacs -Q <RET>
> 2. C-h f <RET> (for example)
> 3. completion <TAB> (for example)
> 4. Completion buffer opens with 131 possible completions

I see this as well in *Completions* buffer:

  Click or type M-RET on a completion to select it.
  Type M-<down> or M-<up> to move point between completions.

  131 possible completions:
  completion--cache-all-sorted-completions
  ...

> 5. In foot of buffer is button that reads:
> [Completions truncated, click here to insert the rest.]

This is what I see at the end of *Completions* buffer: