Issue #2822837 by vaplas, martin107, chiranjeeb2410, klausi, dawehner: Replace @expectedException @expectedExceptionMessage with $this->setExpectedException

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2501183 by borisson_, dileepmaurya, Gábor Hojtsy, Berdir: LocaleLookup cache ID is using numeric indexes of the roles field, not role ID's

Issue #2328919 by Mile23, YesCT, tim.plunkett: Remove () from a bunch of @covers definitions in PHPUnit

Issue #2260121 by sun: PHPUnit Tests namespace of modules is ambiguous with regular runtime namespace (+ Simpletest tests).