WordPress plugin/theme readme file standard. Readme.txt
https://pippinsplugins.com/how-to-properly-format-and-enhance-your-plugins-readme-txt-file-for-the-wordpress-org-repository/
https://make.wordpress.org/themes/2015/04/29/a-revised-readme/
https://wordpress.org/plugins/developers/#readme
https://developer.wordpress.org/plugins/wordpress-org/how-your-readme-txt-works/
https://www.drupal.org/docs/develop/documenting-your-project/readme-template
https://gist.github.com/PurpleBooth/109311bb0361f32d87a2
http://daringfireball.net/projects/markdown/syntax
https://software-development-guidelines.github.io/WP-Readme/
https://generatewp.com/plugin-readme/?clone=test-plugin-readme-txt-file
Readme files
To make your entry in the plugin browser most useful, each plugin should have a readme file named readme.txt that adheres to the WordPress plugin readme file standard. You can put your readme file through the readme validator to check it.
If you’d like to leave feedback, please open an issue on GitHub.