Allow preference sections to define CSS class names

Thomas Bruederli

2015-04-17 a3644638aaf0418598196a870204e0b632a4c8ad

 plugins/additional_message_headers/tests/AdditionalMessageHeaders.php

@@ -5,7 +5,7 @@

    function setUp()
    {
        include_once dirname(__FILE__) . '/../additional_message_headers.php';
        include_once __DIR__ . '/../additional_message_headers.php';
    }

    /**