YourCombinations library
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Downloaded from:  https://github.com/BaseMax/YourCombinationsPHP

Replaces the Combinatorics library used so far, because it has a GPL3 license.
Requires PHP 8.
No changes in the library contents.

Used by function has_permutations() in \question\type\regexp\locallib.php
Regexp question type version xxx June 2024.
