bug#48356: 28.0.50; choose-completion discards the suffix after the completion boundary

[Eli Zaretskii]

> Cc: 48356@debbugs.gnu.org, Daniel Mendler <mail@daniel-mendler.de>,
>  JD Smith <jdtsmith@gmail.com>, Juri Linkov <juri@linkov.net>
> Date: Thu, 11 Apr 2024 04:00:35 +0300
> From: Dmitry Gutov <dmitry@gutov.dev>
> 
> All right, please see the new function completion-base-suffix added in 
> 0288bc6c949. Any docstring improvements (and others) are welcome.

I tried to do that.

Is there any reason why this function shouldn't be called
completion-boundary-suffix instead?

> I guess we should also mention it in NEWS...

Yes, please.