Use new renamed markup method

app/views/projects/blob/viewers/_markup.html.haml

 - blob = viewer.blob
 .file-content.wiki
-  = render_markup(blob.name, blob.data)
+  = markup(blob.name, blob.data)

spec/features/copy_as_gfm_spec.rb

@@ -479,6 +479,7 @@ describe 'Copy as GFM', feature: true, js: true do
     context 'from a blob' do
       before do
         visit namespace_project_blob_path(project.namespace, project, File.join('master', 'files/ruby/popen.rb'))
+        wait_for_ajax
       end
 
       context 'selecting one word of text' do
@@ -520,6 +521,7 @@ describe 'Copy as GFM', feature: true, js: true do
     context 'from a GFM code block' do
       before do
         visit namespace_project_blob_path(project.namespace, project, File.join('markdown', 'doc/api/users.md'))
+        wait_for_ajax
       end
 
       context 'selecting one word of text' do