更新「temp_file/Gemfile」

temp_file/Gemfile

@@ -247,4 +247,7 @@ else
     gem "minitest"
     gem 'minitest-spec-rails'
   end
-end
+end
+group :development do
+  gem 'rails-dev-boost', :git => 'http://github.com/thedarkone/rails-dev-boost.git'
+end