Merge branch 'gt-update-batch-comments-spec' into 'master'

Update batch comments spec

Closes #9411

See merge request gitlab-org/gitlab-ee!9301

ee/spec/features/merge_request/batch_comments_spec.rb

@@ -118,6 +118,7 @@ describe 'Merge request > Batch comments', :js do
 
     context 'in parallel diff' do
       before do
+        find('.js-show-diff-settings').click
         click_button 'Side-by-side'
       end