Behat/Gherkin — comment on commit 79d3475337304c717335c82d7bd80bbcb6866ca7
File: src/Behat/Gherkin/Keywords/ArrayKeywords.php line 173
By stof:

you should filter the array to avoid having stuff like ``||`` in case of an empty return value in a method (which would be the case when returning ``null``)