From the article: "But, most importantly, the code is also duplicated: one version lives in a Markdown file and one (or more) lives in the code folder that com

From the article: "But, most importantly, the code is also duplicated: one version lives in a Markdown file and one (or more) lives in the code folder that comes with the book. If I want to update a snippet of code presented in the book, I have to manually update every copy of it. Yes, cumbersome." I had a similar problem in writing a book about gnuplot: keeping code samples, code in the text, and the generated plots synchronized. I decided doing it manually was too tedious and error-prone, so I wrote some Pandoc filters to do it for me: https://lee-phillips.org/panflute-gnuplot/ https://lee-phillips.org/panflute-gnuplot/