active_model_basics.mdを更新
active_model_basics.mdを更新

参照: https://github.com/rails/rails/compare/5-2-stable...master#diff-3b92cbe6a93bb4be02a7b07f0039a1ad

yasslab/railsguides.jp,yasslab/railsguides.jp,yasslab/railsguides.jp,yasslab/railsguides.jp