core/DataTable/Renderer/Tsv.php

<?php

/**
 * Matomo - free/libre analytics platform
 *
 * @link    https://matomo.org
 * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */

namespace Piwik\DataTable\Renderer;

/**
 * TSV export
 *
 * Excel doesn't import CSV properly, it expects TAB separated values by default.
 * TSV is therefore the 'CSV' that is Excel compatible
 *
 */
class Tsv extends Csv
{
    public function __construct()
    {
        parent::__construct();
        $this->setSeparator("\t");
    }

    /**
     * Computes the dataTable output and returns the string/binary
     */
    public function render(): string
    {
        return parent::render();
    }
}