[ci] Fix Rubocop offenses

Our test suite wasn't working properly which caused that some offenses
slipped in with c0d15d8.

src/api/spec/controllers/source_project_config_controller_spec.rb

@@ -4,6 +4,7 @@
   let(:user) { create(:confirmed_user, login: 'tom') }
   let(:project) { user.home_project }
   let(:remote_project) { create(:remote_project) }
+
   describe 'GET #show' do
     context 'when the home project exist' do
       before do
@@ -13,6 +14,7 @@
 
       it { expect(response).to be_success }
     end
+
     context 'when the project doesnt exist' do
       before do
         login user
@@ -30,6 +32,7 @@
         put :update, params: { project: remote_project.name,
              comment: 'Updated by test', format: :xml }
       end
+
       it { expect(response).to be_forbidden }
     end