bug#57163: completing-read not allow cycling of the options by default

[Eli Zaretskii]

> Cc: uzibalqa@proton.me
> From: Michael Heerdegen <michael_heerdegen@web.de>
> Date: Sat, 13 Aug 2022 06:52:54 +0200
> 
> uzibalqa via "Bug reports for GNU Emacs, the Swiss army knife of text
> editors" <bug-gnu-emacs@gnu.org> writes:
> 
> > Why is it that things like completing-read not allow cycling of the
> > options by default?
> 
> You mean the completion candidates?  M-<up> and M-<down> do that (by
> default).

As does repeatedly pressing TAB, right?  Or maybe I don't understand
what is meant by "cycling" in this context?  An example of using
completing-read and the lack of cycling would be appreciated.