Fix aux viewers

This fixes the Auxiliary viewers on the refactored blob view

app/assets/javascripts/pages/projects/blob/show/index.js

@@ -2,7 +2,7 @@ import Vue from 'vue';
 import VueApollo from 'vue-apollo';
 import TableOfContents from '~/blob/components/table_contents.vue';
 import PipelineTourSuccessModal from '~/blob/pipeline_tour_success_modal.vue';
-import { BlobViewer } from '~/blob/viewer/index';
+import { BlobViewer, initAuxiliaryViewer } from '~/blob/viewer/index';
 import GpgBadges from '~/gpg_badges';
 import createDefaultClient from '~/lib/graphql';
 import initBlob from '~/pages/projects/init_blob';
@@ -39,6 +39,8 @@ if (viewBlobEl) {
       });
     },
   });
+
+  initAuxiliaryViewer();
 } else {
   new BlobViewer(); // eslint-disable-line no-new
   initBlob();

spec/features/projects/blobs/blob_show_spec.rb

@@ -584,6 +584,11 @@ RSpec.describe 'File blob', :js do
     end
   end
 
+  context 'files with auxiliary viewers' do
+    before do
+      stub_feature_flags(refactor_blob_viewer: true)
+    end
+
     describe '.gitlab-ci.yml' do
       before do
         project.add_maintainer(project.creator)
@@ -780,6 +785,7 @@ RSpec.describe 'File blob', :js do
         end
       end
     end
+  end
 
   context 'realtime pipelines' do
     before do