Edit requests of Pythonista以外が環境を汚さずにJupyter Notebookに触れる方法 あるいは，Rubyist以外が環境を汚さずにJupyter NotebookでRubyに触れる方法

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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.
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For more information on the changes, please read this article.