move capybara scenarios to spec/features

spec/requests/notes_on_merge_requests_spec.rb → spec/features/notes_on_merge_requests_spec.rb

@@ -97,8 +97,10 @@ describe "On a merge request diff", js: true, focus: true do
 
     visit diffs_project_merge_request_path(project, merge_request)
 
+    within '.diffs-tab' do
       click_link("Diff")
     end
+  end
 
   subject { page }