gemfile.rb in appraisal-3.0.0.rc1

- old
+ new

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 require "appraisal/bundler_dsl"
 
 module Appraisal
   autoload :Gemspec, "appraisal/gemspec"
   autoload :Git, "appraisal/git"