Chnaged noteable class check

app/views/layouts/_init_auto_complete.html.haml

 - project = @target_project || @project
-- noteable_class = @noteable.nil? ? nil : @noteable.class
+- noteable_class = @noteable.class if @noteable.present?
 
 :javascript
   GitLab.GfmAutoComplete.dataSource = "#{autocomplete_sources_namespace_project_path(project.namespace, project, type: noteable_class, type_id: params[:id])}"