Currently, in TexVC(PHP) there is a bug that makes it necessary to reformat regex conditions in some cases within the buildParserPHP builder when creating a new grammar Parser.php
Ideally, this is solved within phpeggy.

The reported issue in phpeggy is here:
https://github.com/MarcelBolten/phpeggy/issues/4

Here is a minimal example of the erroneous case:
https://gist.github.com/Hyper-Node/e103c1f3cf407a10dec9b137331ade7f

Edit TBD:
Remove the fixes in builder and check if all tests are still running again.
Keep this in mind when fixing the final unicode testcases.

As soon as the case is fixed, remove the regex reformatting from the buildparser.