Issue #2927746 by alexpott, catch, slasher13, mpdonadio, martin107, RoSk0, jibran, larowlan, pounard, Mile23, Jo Fitzgerald, deviantintegral, pritish.kumar: Update Symfony components to 3.4.*

Issue #2933424 by David_Rothstein, harsha012, jhodgdon, vaplas: English-specific links to php.net shouldn't be used in non-translatable strings

Issue #2926309 by vaplas, alexpott, mpdonadio, tacituseu, Mixologic: Random fail due to APCu not being able to allocate memory

Issue #2870194 by alexpott, Mile23, jibran, larowlan, tim.plunkett: Ensure that process-isolated tests can use Symfony's PHPunit bridge to catch usages of deprecated code

SA-CORE-2017-003 by Berdir, David_Rothstein, Wim Leers, alexpott, catch, cilefen, larowlan, mlhess, pwolanin, quicksketch, samuel.mortenson, smaz, stefan.r, xjm

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 #2754217 by alexpott, xjm, dawehner, martin107: Random Test Failure with "failed to open stream" for temporary://.htaccess

Issue #2796105 by larowlan, Sam152, Yogesh Pawar, alexpott, dawehner, anish.a, Fabianx: Move similar methods in BrowserTestBase / WebTestBase to a trait; untangle installDrupal()

Issue #2804675 by alexpott, hideaway: Tests using TestDatabase class are stuck in an infinite loop in Windows (8.2.0-rc2 only)

Issue #2801817 by Mile23: Inject services inot SimpletestTestForm and functional cleanup for the test_discovery service

Issue #2572693 by Mile23, andriyun, andypost, attiks: Fix 'Drupal.ControlStructures.ControlSignature' coding standard

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

Issue #2609680 by alexpott, jhedstrom: Add an AssertMailTrait to allow mail testing in Kernel tests and fix odd stdout not found in test output

Issue #2493911 by dawehner, larowlan, damiankloip, hussainweb, jibran, cilefen, benjy, iMiksu, mtdowling: Update guzzle, goutte and mink-goutte-driver to the latest release

Issue #2389811 by znerol, mpdonadio, alexpott, hussainweb, neclimdul: Move all the logic out of index.php (again)

Issue #2381763 by chx, webflo: Adjust the order of container yamls to override settings per environment

Issue #2392787 by beejeebus, dawehner, alexpott: Move include statements from DrupalKernel::boot() into DrupalKernel::preHandle()

Issue #2328111 by dawehner, martin107, neclimdul: Replace most instances of the DRUPAL_ROOT constant with the app.root container parameter.

Issue #2367557 by mpdonadio: Fixed Update TestKernel to match class loader changes in Drupal Kernel.

Issue #2028109 by tim.plunkett, almaudoh, twistor, larowlan, slashrsm, Berdir, Arla, neclimdul, Cottser: Convert hook_stream_wrappers() to tagged services.

Issue #2248845 by sun: Fixed [run-tests.sh] simpletest_phpunit_xml_filepath() depends on public:// stream wrapper.

Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel.

Revert "Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel."

This reverts commit cda051c4.

Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel.

Issue #2168809 by sun, damiankloip: Do not add the Guzzle HTTP client request subscriber outside of test environment.

Issue #2257427 by sun: Run-tests.sh builds + rebuilds two kernels from scratch for every PHP process.