[bug#70057] [PATCH]

[jgart]

Hi Fabio,

I reviewed and applied borgmatic with some minor changes.

I consolidated the propagated-inputs to be part of the inputs as it was in the 
previous existing package. 
h
Since borgmatic is an end user application we do not need to propagate the 
Python library dependencies.

I also applied guix style to the package which introduced some formatting 
changes and mentioned the changes in the commit message.

all the best,

jgart