[6.x] Added `unless` condition to Blade custom `if` directives #30492
This PR registers an additional
To illustrate, the example in the docs is:
This PR would enable the following:
This simple case would otherwise have to be done with an empty first condition, e.g.:
This feels like a minor non-breaking change, so I've submitted to the 6.x branch. Apologies if I've got this wrong.