Relax assert in AbstractBasicTest::testRequireAuth

Author: DeepDiver1975

tests/Sabre/DAV/Auth/Backend/AbstractBasicTest.php

@@ -60,7 +60,7 @@ function testRequireAuth() {
         $backend->setRealm('writing unittests on a saturday night');
         $backend->challenge($request, $response);
 
-        $this->assertEquals(
+        $this->assertContains(
             'Basic realm="writing unittests on a saturday night"',
             $response->getHeader('WWW-Authenticate')
         );