Fix specs

spec/features/milestone_spec.rb

@@ -24,7 +24,7 @@ feature 'Milestone', feature: true do
       find('input[name="commit"]').click
 
       expect(find('.alert-success')).to have_content('Assign some issues to this milestone.')
-      expect(page).to have_content('Nov 16, 2016 - Dec 16, 2016')
+      expect(page).to have_content('Nov 16, 2016–Dec 16, 2016')
     end
   end
 

spec/helpers/milestones_helper_spec.rb

@@ -17,7 +17,7 @@ describe MilestonesHelper do
     it { expect(result_for(due_date: yesterday)).to eq("expired on #{yesterday_formatted}") }
     it { expect(result_for(start_date: tomorrow)).to eq("starts on #{tomorrow_formatted}") }
     it { expect(result_for(start_date: yesterday)).to eq("started on #{yesterday_formatted}") }
-    it { expect(result_for(start_date: yesterday, due_date: tomorrow)).to eq("#{yesterday_formatted} - #{tomorrow_formatted}") }
+    it { expect(result_for(start_date: yesterday, due_date: tomorrow)).to eq("#{yesterday_formatted}–#{tomorrow_formatted}") }
   end
 
   describe '#milestone_counts' do