Subject: bug#47368: 28.0.50; map-elt returns nil without "deprecated" TESTFN

From: Michael Heerdegen <[email-masked]>
Date: Sat, 27 Mar 2021 00:23:38 +0100

Stefan Monnier <[email-masked]> writes:

> How 'bout always using `equal`?

I think it would be an improvement.

But are alists the only exception - are we sure there are no useful
implementations of map types were the TESTFN is not constant?  Like a
dictionary where we sometimes want to look up a word case-sensitively,
and if none found, case-insensitively?

Michael.