Add firstaid for acro

[josephwright]

READ ME FIRST: Please understand that in most cases we will not be able to merge a pull request because there are a lot of internal activities needed when updating the LaTeX2e sources. If you have a code suggestion please discuss it with the team first.

Pull requests in this repository are intended for LaTeX Team members only.

Internal housekeeping

Status of pull request

• Feedback wanted
• Under development
• Ready to merge

Checklist of required changes before merge will be approved

• Test file(s) added
• Version and date string updated in changed source files
• Relevant \changes entries in source included
• Relevant changes.txt updated
• Rollback provided (if necessary)?
• ltnewsX.tex (and/or latexchanges.tex) updated

[muzimuzhi]

With l3kernel 2024-02-18 (or maybe 2024-02-20), loading acro won't raise errors any more, and since acro.sty always clears \l__acro_tmpa_prop before setting to it, it seems to me there's no urgent need to firstaid acro.

PS: Original report to acro: cgnieder/acro#268.

[josephwright]

@muzimuzhi Bruno's patch to make that work is meant to be temporary. I'm trying to cover the case where someone installs the TL'24 ISO then updates just expl3: ideally that should 'just work' even if we remove Bruno's patch (for performance reasons).

[FrankMittelbach]

Can't see anything wrong with this and giving the timeline I would apply the firstaid.

[josephwright]

@FrankMittelbach Good to go for all three?

[FrankMittelbach]

guess so, but they probably don't play if merged one after another (without further updating) or do they?

[josephwright]

No but I'll sort that :)