Mattias Engdegård <mattias.engdegard@gmail.com> writes:

> 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.

...and my test did not catch that edge case.  I extended the test with
this and an empty ‘math-read-replacement-list’ for good measure
(although I don't quite know which use case that might be).  The test
fails for the previous version and succeeds for the original and this
new one.

Have I missed any other edge cases in the test?

I appended the updated patch.