Florian Schlichting 19eb79ebf9 provide defaults for unused function parameters (fixes #155)
PHP 7.1 throws an exception when a user-defined function is called with
too few arguments: http://php.net/manual/en/migration71.incompatible.php

As explained in the comments, collection_privilege_format_function and
principal_privilege_format_function take three arguments because of
their use as a rendering callback, however the latter two of them are
never used and thus can be ommitted in other uses.
2018-12-29 19:38:13 +01:00
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