@Ravlen If you could have a look over this, that'd be great!

@pyrmont I'm not a developer (I'm a technical writer with GitLab, though I noticed I really should have updated my profile -> done) and am not sure how to test this locally, but the regex certainly seems to make sense. Instead of triple backtick/tilde fences, it's 3 or more, and then match the capturing group for the closing fence. Perfectly logical.

Could you double check that this doesn't break when nesting codeblocks (the primary reason for quad fences)? So, a real use case I might have, in our style guide explaining how to use code blocks:

Use a colon to introduce codeblock examples, and use triple backtick fences with
a language tag to make sure the Rouge code coloring will apply:

````markdown
Here is an example of [feature](../feature.md):

```console
$ echo "Sample feature output"
```
````

If this example works too, then I'm 100% thrilled to see the fix! 🙇 🎉 We use Rouge for both GitLab and our docs site, so it will be a big help. I run into edge cases from time to time, and I'll see if I can at least suggest improved Regex next time, if I can figure it out. 👍

+1 from me, looks good on the implementation as well.

Thanks all! I've merged it in and this will be part of the v3.17.0 release. That's scheduled to be pushed out on Tuesday 10 March.