lib/bundler/ui/shell.rb in bundler-1.11.2 vs lib/bundler/ui/shell.rb in bundler-1.12.0.pre.1

@@ -1,10 +1,11 @@
+# frozen_string_literal: true
 require "bundler/vendored_thor"
 
 module Bundler
   module UI
     class Shell
-      LEVELS = %w(silent error warn confirm info debug)
+      LEVELS = %w(silent error warn confirm info debug).freeze
 
       attr_writer :shell
 
       def initialize(options = {})
         if options["no-color"] || !STDOUT.tty?