How to make it compatible with pymodwnx.snippets?

[Guts]

Hi @daxartio,

Been a while. It's impressive to see the good job you made here since I had a look :clap:.

I'm facing a case remembering me the race condition between processors we've met before but I've not investigated a lot.

Use case:

• a project with a well-documented README.md with termynal comment:

  [...]
  ## Installation
  
  <!-- termynal: {"prompt_literal_start": [">"], title: Terminal} -->
  
  ```sh
  > pip install mkdocs-rss-plugin
  ---> 100%
  RSS plugin for Mkdocs installed! Add 'rss' to your 'plugins' section in mkdocs.yml
  [...]
  ```
  
  

• a docs/index.md where I would like to reuse the README.md content using pymodwnx.snippets:

  --8<-- "README.md"
  [...]
  

Sadly the render is not working:

Any idea?