[why]
The generated file `nerd-fonts-generated.css` is made smaller with an
external service as manual step...
# [Nerd Fonts] The following is generated from the build script, then through https://www.minifier.org/
We do not want any manual steps.
[how]
Luckily the difference is just to remove whitespaces and unneeded
semicoli. We can do the same while generating.
[note]
At first I tried to postprocess the generated file with sed, but of
course the strings that have blanks in them made that rather
complicated.
Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>