Bug: Elvis operator in GeneratesDocumentationSidebar.php skips first entry in sidebar order array

[caendesilva]

Line 33 in GeneratesDocumentationSidebar.php

$order = array_search($slug, $orderArray) ?: 999;

thinks that the first array key which is 0 is false and assigns it 999.

Fixed using

$order = ($position = array_search($slug, $orderArray)) === null ? 999 : $position;