Appraisals in html-pipeline-2.11.0 vs Appraisals in html-pipeline-2.11.1

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 appraise 'rails-3' do
   gem 'rack', '< 2'
   gem 'rails', '3.2.22.2'
 end