bug#21644: 24.4; completing-read acts differently on functional collection

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Dmitry Gutov <dgutov@yandex.ru>,  21644@debbugs.gnu.org,  
> rct@thompsonclan.org,  drew.adams@oracle.com,  ohwoeowho@gmail.com
> Date: Fri, 16 Oct 2015 09:12:36 -0400
> 
> > Btw, the completion--unquote argument to COMPLETION is not documented
> > -- is that on purpose?
> 
> Yes.  It's only used internally by completion-table-with-quoting.

So no user COLLECTION callback will ever be called with it?