Editing: DuplicateMethodException.php

<?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\Framework\MockObject;

use function array_diff_assoc;
use function array_unique;
use function implode;
use function sprintf;

/**
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 */
final class DuplicateMethodException extends \PHPUnit\Framework\Exception implements Exception
{
    /**
     * @psalm-param list<string> $methods
     */
    public function __construct(array $methods)
    {
        parent::__construct(
            sprintf(
                'Cannot double using a method list that contains duplicates: "%s" (duplicate: "%s")',
                implode(', ', $methods),
                implode(', ', array_unique(array_diff_assoc($methods, array_unique($methods)))),
            ),
        );
    }
}