CSS File nice_menus_default causes White Screen of Death when optimizing CSS files

Issue Summary

When I clicked on 'Optimize CSS files' in the performance section of a Drupal site that I am working on, my site would get a White Screen of Death. After a lot of trying to figure out what is going on, the call where this would occur is with function drupal_load_stylesheet() on nice_menus_default.css. It seems to have trouble running preg_replace on the following part in the CSS file (part of the nice_menus documentation):

While the documentation is necessary, removing it allows the site to run the CSS aggregation + optimization to run correctly. Perhaps the documentation can be written in a different way to that it is still friendly on the function?

As a secondary note, this same comment also affects the 5.x build of the module (the same fix resolves the issue).

The patch I am attaching removes the offending comments (though hopefully it can become better documentation).