bug#40372: Add emacs-beancount

[Christopher Lemmer Webber]

Ludovic Courtès writes:

> Hello Chris!
>
> Christopher Lemmer Webber <address@hidden> skribis:
>
>> Hot on the heels of beancount!
>>
>> Also is able to inherit the beancount package in a really elegant way,
>> since it's installing a .el file from that.  Moments like this make me
>> say "I love Guix's delightful design!"
>
> Heheh.  :-)
>
>> From 7fda36e4be1abc16a9855e13ee450927f0f0e25a Mon Sep 17 00:00:00 2001
>> From: Christopher Lemmer Webber <address@hidden>
>> Date: Wed, 1 Apr 2020 08:48:25 -0400
>> Subject: [PATCH] gnu: Add emacs-beancount.
>>
>> * gnu/packages/emacs-xyz.scm (emacs-beancount): New variable.
>
> [...]
>
>> +    (synopsis "Emacs mode for beancount")
>> +    (description
>> +      "Emacs mode for the beancount accounting tool.")))
>
> Bonus points if you can turn that into a full sentence.  :-)
>
> Otherwise LGTM, thank you!
>
> Ludo’.

Ok, done and pushed!  Thanks!