bug#43866: 26.3; italian postfix additions

[Francesco Potortì]

>> From: Francesco Potortì <pot@gnu.org>
>> Date: Thu, 08 Oct 2020 14:05:55 +0200
>> 
>> Since the inception of mule, amyyears ago, I have set up an environment
>> where I switch between italian-postfix and american input methods.
>> 
>> Now I realise that I have made long time ago an addition to italian that
>> has never gone into emacs.
>> 
>> The rationale is that in Italy latin-9 should be used insterad of
>> latin1, which does not contain the euro symbol.  And that
>> italian-postfix should allow introducing the euro symbol.
>
>The Latin-1 vs Latin-9 part is not important nowadays, since Emacs
>uses Unicode internally.

I don't know if that's ever used, maybe changing it is worth enyway.

>As for the Euro symbol, I guess we need to add it to all the Latin
>input methods, not just the Italian one?

I guess yes.