bug#25929: 25.2; map-delete doesn't delete permanently 1st alist elt

[Lars Ingebrigtsen]

Tino Calancha <tino.calancha@gmail.com> writes:

> *) It happens just for alist, other maps are fine.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

Various things were proposed here, but they all had problems.  So I
don't think there's much to be done here except documenting this, which
I've now done in Emacs 29.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no