bug#67536: 29.1; Calc mode's math-read-preprocess-string conses unnecessarily

[Mattias Engdegård]

16 dec. 2023 kl. 10.40 skrev Eli Zaretskii <eliz@gnu.org>:

> Mattias, is this okay with you?  Should I install these patches?

So very sorry for the hiatus. I've been a bit poorly and getting back will take 
some time.

Raffael, thank you for your dogged measurements. Of course my clumsy code 
didn't preserve the possibility for `math-read-replacement-list` to translate 
strings longer than a single character but that's what I get for sending 
off-cuff patches that way.

Here's another off-cuff patch that might work better (demonstrating that I've 
learned nothing).

Again it's most likely that no user ever changes `math-read-replacement-list` 
and the code could be simplified a lot.

calc-aent.diff
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