There were 2 failures:

1) ApiDocumentationTest::testDocumentationExists with data set "Module imagetweaks with MiserMode=false, AllowCategorizedRecentChanges=false" ('imagetweaks', array(false, false))
Module description message apihelp-imagetweaks-description exists
Failed asserting that false is true.

C:\Users\Anwender\Documents\xampplite\htdocs\core\tests\phpunit\structure\ApiDocumentationTest.php:51
C:\Users\Anwender\Documents\xampplite\htdocs\core\tests\phpunit\structure\ApiDocumentationTest.php:80
C:\Users\Anwender\Documents\xampplite\htdocs\core\tests\phpunit\MediaWikiTestCase.php:399
C:\Users\Anwender\Documents\xampplite\htdocs\core\maintenance\doMaintenance.php:111

2) ApiDocumentationTest::testDocumentationExists with data set "Module imagetweaks with MiserMode=true, AllowCategorizedRecentChanges=true" ('imagetweaks', array(true, true))
Module description message apihelp-imagetweaks-description exists
Failed asserting that false is true.

C:\Users\Anwender\Documents\xampplite\htdocs\core\tests\phpunit\structure\ApiDocumentationTest.php:51
C:\Users\Anwender\Documents\xampplite\htdocs\core\tests\phpunit\structure\ApiDocumentationTest.php:80
C:\Users\Anwender\Documents\xampplite\htdocs\core\tests\phpunit\MediaWikiTestCase.php:399
C:\Users\Anwender\Documents\xampplite\htdocs\core\maintenance\doMaintenance.php:111

FAILURES!