Add test for EE-only for "semi-linear history" strategy

spec/ee/spec/features/projects/project_settings_spec.rb

+require 'spec_helper'
+
+describe 'Edit Project Settings' do
+  let(:user) { create(:user) }
+  let(:project) { create(:project, namespace: user.namespace, path: 'gitlab', name: 'sample') }
+
+  before do
+    sign_in(user)
+  end
+
+  describe 'Merge request settings section' do
+    it 'shows "Merge commit with semi-linear history " strategy' do
+      visit edit_project_path(project)
+
+      page.within '.merge-requests-feature' do
+        expect(page).to have_content 'Merge commit with semi-linear history'
+      end
+    end
+  end
+end