Updated org-mode and markdown Syntax to Fix Formatting Issues with org-ruby

[melioratus]

While reading through your well written literate programing examples repository, I found a small number of formatting issues that are primarily due to how org-ruby parses org-mode files. At the moment Github and GitLab use org-ruby to render org syntax into markdown which is transformed into HTML.

Please review my updates and accept my pull request if you think these changes are helpful.

Thank you for writing and sharing your expertise through your literate programing examples repository!

Best wishes!

Melioratus