Rails 2.3.5

Upgrade to Rails 2.3.5.
Also work around this bug:
 https://rails.lighthouseapp.com/projects/8994/tickets/3524
created by the aforementioned
Rails release.

vendor/rails/railties/lib/commands/plugin.rb

@@ -268,7 +268,7 @@ class Plugin
     
     def install_using_git(options = {})
       root = rails_env.root
-      install_path = mkdir_p "#{root}/vendor/plugins/#{name}"
+      mkdir_p(install_path = "#{root}/vendor/plugins/#{name}")
       Dir.chdir install_path do
         init_cmd = "git init"
         init_cmd += " -q" if options[:quiet] and not $verbose