[bug#72057] Small changes required

[Andreas Enge]

Hello,

thanks for the patch! It builds, but has a few minor problems,
notably with white space and other formatting issues, see here:
   https://qa.guix.gnu.org/issue/72057
These can also be found by running
   ./pre-inst-env guix lint python-sacn
locally.

Could you prepare a new version and send it following the
instructions at
   
https://guix.gnu.org/de/manual/devel/en/html_node/Sending-a-Patch-Series.html#Single-Patches-1
(paragraph starting with: "If you need to send a revised patch...")?

Adding a copyright line is good practice when adding a new package.

Thanks!

Andreas