script/worker_analysis in image_optim-0.26.3 vs script/worker_analysis in image_optim-0.26.4

@@ -1,7 +1,8 @@
 #!/usr/bin/env ruby
 # encoding: UTF-8
+# frozen_string_literal: true
 
 require 'bundler/setup'
 
 require 'image_optim'
 require 'image_optim/cmd'
@@ -10,11 +11,11 @@
 require 'gdbm'
 require 'digest'
 require 'erb'
 require 'ostruct'
 
-DIR = 'tmp'.freeze
+DIR = 'tmp'
 Pathname(DIR).mkpath
 
 Array.class_eval do
   # For an array of arrays with possible values yields arrays with all
   # combinations of values
@@ -457,10 +458,10 @@
         @time = steps.sum(&:time)
         @avg_time = time / steps.length
       end
 
       def unused?
-        success_count.zero?
+        success_count == 0
       end
     end
 
     attr_reader :name, :results, :ids2names
     def initialize(name, results, ids2names)