Apply selected suggestions courtesy of darker (from black)

[bernhardkaindl]

Courtesy of the tool darker (applies black to the changes in a git diff),
here is a set of a few minor formatting suggestions it makes for #35.

This is an incremental PR for #35 (it can be merged/squashed into #35 or reviewed afterwards):

This PR only applies to the 2nd commit of #35, so it could be pulled and squashed into it:
CA-369899: Add NTP options DHCP|Default|Manual|None

I ran:

pip install darker
darker -r master -S -l 88 .

(88 columns is the default of black - take look yourself, it looks sensible to me too)

As this branch is on the same origin repo, you can e.g. run

git fetch origin
git cherry-pick aef00d4d7d73b58ef05a2a62e4fe5a9eb5adcfde
git rebase -i HEAD~3

and squash it into the commit CA-369899: Add NTP options DHCP|Default|Manual|None

Current commit:
Apply selected suggestions courtesy of darker (from black)