Fix build error in project_spec.rb
Fix build error in project_spec.rb

Follow up of https://github.com/bbatsov/rubocop/pull/5676/commits/7949f49309a17f7a61899e9ab714236430d1db42.

This PR fixes the following build error in Travis CI.
https://travis-ci.org/bbatsov/rubocop/jobs/354133118

It also removes unnecessary blank line inserted by #5632. It's just a nitpick.

scottmatthewman/rubocop,deivid-rodriguez/rubocop,panthomakos/rubocop,meganemura/rubocop,sue445/rubocop,jfelchner/rubocop,maxjacobson/rubocop,panthomakos/rubocop,tdeo/rubocop,tejasbubane/rubocop,rrosenblum/rubocop,bquorning/rubocop,petehamilton/rubocop,meganemura/rubocop,rrosenblum/rubocop,vergenzt/rubocop,smakagon/rubocop,rrosenblum/rubocop,sue445/rubocop,pocke/rubocop,deivid-rodriguez/rubocop,petehamilton/rubocop,jfelchner/rubocop,maxjacobson/rubocop,meganemura/rubocop,palkan/rubocop,mikegee/rubocop,maxjacobson/rubocop,tejasbubane/rubocop,vergenzt/rubocop,haziqhafizuddin/rubocop,tdeo/rubocop,mikegee/rubocop,tdeo/rubocop,deivid-rodriguez/rubocop,akihiro17/rubocop,scottmatthewman/rubocop,jmks/rubocop,bbatsov/rubocop,jmks/rubocop,jfelchner/rubocop,jmks/rubocop,bquorning/rubocop,palkan/rubocop,palkan/rubocop,akihiro17/rubocop,pocke/rubocop,akihiro17/rubocop,mikegee/rubocop,bquorning/rubocop,panthomakos/rubocop,bbatsov/rubocop,smakagon/rubocop,sue445/rubocop,vergenzt/rubocop,petehamilton/rubocop,tejasbubane/rubocop,haziqhafizuddin/rubocop