Edit requests of サンプルコードでわかる！Ruby 2.7の主な新機能と変更点 Part 1 - 番号指定パラメータ（numbered parameter）

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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.