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

Follow up of #5410.

This PR fixes the following error on Travis CI.

```console
% bundle exec rspec ./spec/project_spec.rb
Run options: include {:focus=>true}

All examples were filtered out; ignoring {:focus=>true}

Randomized with seed 45488
..............F.F

Failures:

  1) RuboCop Project changelog entry body ends with a punctuation
     Failure/Error: expect(bodies).to all(match(/[\.\!]$/))

       expected ["Add new `` cop.", "Add new `` cop.", "Add new ``
       cop.", "Add new `` cop.", "Add new `` cop.", "Add ...nclosed in
       braces are not noticed.", "Received malformed format string
       ArgumentError from rubocop."] to all match /[\.\!]$/

          object at index 18 failed to match:
             expected "Fix ``'s false positive with a method
             call with arguments. ([@pocke][]) " to match /[\.\!]$/
     # ./spec/project_spec.rb:174:in `block (5 levels) in <top (required)>'

  2) RuboCop Project changelog entry after version 0.14.0 has a link to
  the contributors at the end
     Failure/Error: expect(entries).to all(match(/\(\[@\S+\]\[\](?:, \[@\S+\]\[\])*\)$/))

       expected ["* [#3666](https://github.com/bbatsov/rubocop/issues/3666): Add new
       `Naming/UncommunicativeBlockPara...552): `RaiseArgs` allows
       exception constructor calls with more than one 1
       argument. ([@bbatsov][])"] to all match /\(\[@\S+\]\[\](?:, \[@\S+\]\[\])*\)$/

          object at index 18 failed to match:
             expected "* [#5393](https://github.com/bbatsov/rubocop/issues/5393):
             Fix `Rails/Delegate`'s false positive with a
             method call with arguments. ([@pocke][]) " to
             match /\(\[@\S+\]\[\](?:, \[@\S+\]\[\])*\)$/
     # ./spec/project_spec.rb:123:in `block (5 levels) in <top (required)>'

Finished in 1.36 seconds (files took 1.07 seconds to load)
17 examples, 2 failures

Failed examples:

rspec ./spec/project_spec.rb:173 # RuboCop Project changelog entry body
ends with a punctuation
rspec ./spec/project_spec.rb:122 # RuboCop Project changelog entry after
version 0.14.0 has a link to the contributors at the end
```

https://travis-ci.org/bbatsov/rubocop/jobs/325980721#L1146-L1162

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