Update more cookbooks

cookbooks/hostname/Thorfile

@@ -6,12 +6,12 @@ require 'bundler/setup'
 require 'shellwords'
 
 class Cookbook < Thor
-  COOKBOOK_NAME = 'hostname'
-  COOKBOOK_CATEGORY = 'utilities'
+  COOKBOOK_NAME = 'hostname'.freeze
+  COOKBOOK_CATEGORY = 'utilities'.freeze
 
   include Thor::Actions
 
-  desc :edit, "Edit cookbook in browser"
+  desc :edit, 'Edit cookbook in browser'
   def edit
     open "http://community.opscode.com/cookbooks/#{COOKBOOK_NAME}/edit"
   end
@@ -35,7 +35,7 @@ class Cookbook < Thor
   def open_cmd
     @open_cmd ||= %w[open xdg-open].find do |command|
       system "which #{command} >/dev/null 2>&1"
-      $?.success?
+      $CHILD_STATUS.success?
     end
   end
 end