Since Confluence can handle custom language brushes again and SYS-1120 is resolved now, we can again applying the YAML code style brush to code snippets done with one the code macros again.

When the error with the custom brush appeared, we were changing the language style from YAML to javascript via script (see SYS-1120).
However, to run the script in the opposite direction seems dangerous, because we have javascript code snippets on which we want to keep the javascript brush not applying the YAML brush.

So ... the question is how to do a bulk change without "damaging" javascript code snippets.