http://cardzoneqzvq6tkywkbpbbclp4sb4o4ry7piwkwx3om6qkxjmksb4zyd.onion/cz/wp-includes/js/dist/blocks.js
* When matching strings whose format delimiters are unbalanced
* to the left or right, the output is intentionally as a
* conventional regex library with recursion support would
* produce, e.g. " < " and " >" both produce ["x"] when using
* " <" and ">" as the delimiters (both strings contain a single,
* balanced instance of " ")