Hi, There seems to be an inconsistency between the Org syntax spec and the actual behavior regarding text markup: the spec forbids `,`, `'` and `"` in the border, yet it seems to work just fine to use them there in the current version of Org. I think it's great that Org mode supports this, but since the spec hasn't been updated to reflect this change, external Org parsers which follow it don't. An example is org-ruby, which is used by both GitLab and GitHub to render README files: https://github.com/wallyqs/org-ruby/issues/36
~ Kim
