What does "empty input exists" mean ?

Ihor Radchenko <yantar92@posteo.net> writes:

> Sébastien Gendre <seb@k-7.ch> writes:
>
>> I have found that on Vanilla Emacs, it's "C-j".
>>
>> And with Vertico, it's "Alt-Enter".
>>
>> I wonder if we need to document it. In the docstring of
>> "org-cite-insert" and in the documentation. Of course, not mentioning
>> every possible shortcut. But at least telling how the command
>> "org-cite-insert" behave. And the general idea of how user can stop the
>> reference selection.
>
> The minibuffer prompt in `org-cite-insert' says: "empty input exits"
> IMHO, it is more than enough. In fact, better than shelving it deep into
> the manual/docstring.