new_variant: fix pylint issues

Fix multiple pylint issues, mostly with line length

BUG=None
TEST=`cros lint` on the changed files reports no warnings

Change-Id: Ia7291d1b35ddf944f90be88117aa2612dca4d28a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2552984
Tested-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Paul Fagerburg <pfagerburg@chromium.org>
4 files changed