Edit requests of Railsのcontrollerにおいて、メソッド外で初期化したインスタンス変数を参照すべきでない理由

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We released Markdown parser changes on February 24, 2022. There may be some unexpected appearance changes in this update, because this article was posted before the changes.
Please don't forget to check the preview before updating your article.
For more information on the changes, please read this article.