bug#81411: 31.0.90; Selecting completion for completing-read-multiple does not respect completion boundaries

Eli Zaretskii <[email protected]> writes:

>> Cc: [email protected]
>> Date: Mon, 03 Aug 2026 17:35:53 -0400
>> From: Aaron Zeng via "Bug reports for GNU Emacs,
>>  the Swiss army knife of text editors" <[email protected]>
>> 
>> I spent some time staring at this and ended up coming up with a patch.
>> I noticed a separate issue where the existing code was not finding the
>> boundaries of the element correctly (if crm-separator matches more
>> than one character), so the first patch changes it to use the
>> crm--completion-command helper to come up with the boundaries.
>> 
>> The second patch fixes the initial reported bug.  Within the
>> boundaries of the element, it now calls completion-boundaries to get
>> the new boundaries of the part of that element to be completed.
>> 
>> On my machine, I tested that it fixes my initial reproduction example
>> as well as the downstream issue I noticed in my site's extensions, but
>> would appreciate any additional feedback and testing.
>
> Thanks.  Spencer and Stefan, any comments to the patch?

It looks right to me.  It would be nice if it came with a test though.