Log Message:
devel/ruby-pathutil: update to 0.16.1

0.16.0						2017/10/05

* Fix the homepage URL in the gemspec. (#2)
* Drop CodeClimate.
* Fix #3: Remove `luna-rubocop-formatters`.
* Do a little cleanup.
* Update Copyright year.
* Pathutil added `#empty?` in 2.4.

0.16.1						2017/12/12

* Add Pathutil#[], so we are compatible with RSpec.