Guardfile in discourse_theme-0.4.0 vs Guardfile in discourse_theme-0.4.1

@@ -1,4 +1,5 @@
+# frozen_string_literal: true
 directories %w(app lib test) \
   .select { |d| Dir.exists?(d) ? d : UI.warning("Directory #{d} does not exist") }
 
 guard :minitest do
   # with Minitest::Unit