You can try {{|{}}{code}}...{{|{}}{code}}

{{code}}This is a code block{{/code}}

Reopen if that doesn't work for you.

Ignore the above. I've changed the code block syntax.

The syntax sort-of works, but not as intended. I tried both code...\code and code.../code and results vary, both results are not what I would expect.

I tried commenting, send you a PM on the forums.

Fixed. Use ~~~ syntax:

~~~
put code here...
~~~