Rakefile in ppl-4.0.3 vs Rakefile in ppl-4.0.5

@@ -7,19 +7,19 @@
 end
 
 task :disable_config do
   pplconfig = File.expand_path("~/.pplconfig")
   bkpconfig = File.expand_path("~/.pplconfig.bkp")
-  if File.exists? pplconfig
+  if File.exist? pplconfig
     FileUtils.mv pplconfig, bkpconfig
   end
   at_exit { Rake::Task["enable_config"].invoke }
 end
 
 task :enable_config do
   pplconfig = File.expand_path("~/.pplconfig")
   bkpconfig = File.expand_path("~/.pplconfig.bkp")
-  if File.exists? bkpconfig
+  if File.exist? bkpconfig
     FileUtils.mv bkpconfig, pplconfig
   end
 end
 
 task :feature, :feature_name do |task, params|