Issue #2961691 by alexpott, Berdir, timmillwood, idebr: Change SYMFONY_DEPRECATIONS_HELPER back to strict

Issue #1507896 by b0unty, tuutti, Jeff Burnz, LewisNyman, tameeshb, realityloop, cbanman, umarzaffer, manumilou, mgifford, mducharme, oakulm, lauriii, alexpott, joelpittet, MaskyS, markcarver, xjm: Allow theme developers to add the default logo filename to the theme's .info.yml

Issue #2937888 by dhruveshdtripathi, idebr, RoSk0, mohit1604, mfernea, borisson_: Fix 'Drupal.Commenting.DocComment.LongNotCapital' coding standard

Issue #2572613 by Malevi4, idebr, pfrenssen, Mile23, RajeevK: Fix 'Drupal.Array.Array.CommaLastItem' coding standard

Issue #2901730 by mfernea, ankitjain28may, idebr: Fix 'Squiz.WhiteSpace.FunctionSpacing' coding standard

Issue #2832083 by rbayliss, pounard, alexpott, dawehner: ThemeRegistryLoader::findTemplate() breaks Twig_Loader_Filesystem signature

Issue #2528284 by cilefen, dawehner, Cottser, David_Rothstein: Document that alternate Drupal 8 theme engines must implement auto-escape or they are not secure

Issue #2930407 by tstoeckler, lauriii, alexpott: Allow specifying summary attributes for details elements

Issue #2828143 by alexpott, klausi, xjm: Stop tests like LocaleConfigTranslationImportTest from failing if l.d.o becomes unavailable

Issue #2923496 by mark_fullmer, dpfitzsi, krina.addweb: [Link module] Validation for title but no link, when title optional

Issue #2912169 by alexpott, tobiberlin, Berdir, dawehner, grahamC: Inject the argument resolver into HttpKernel::__construct

Issue #1848940 by milanpavic, dawehner, nod_, helenasue, DuaelFr, Lendude, AjitS, sdstyles, runeasgar, tim.plunkett: When enabling or disabling a View, don't move the cursor to the top of the page

Issue #2968541 by vokidas, borisson_: ActiveLinkResponseFilter fails to set active link with query in non-alphabetical order

Issue #2970132 by neerajsingh, webflo: .ht.router.php causes a redirect loop when invoked from parent directory

Issue #2849669 by alexpott, pwolanin, Munavijayalakshmi, dawehner: Fix \Drupal\Component\Utility\Unicode() because of the Symfony mbstring polyfill

Issue #2958744 by msankhala, joachim: hook_entity_field_access() should explain when $items is not given

Issue #2918535 by stella, Eli-T, webchick, smaz, ckrina, markconroy, kjay: Add initiative coordinator(s) for Out-of-the-Box

Issue #2969757 by marcel66, amateescu, alexpott: Fix "The Drupal\migrate\Plugin\migrate\process\Iterator is deprecated in Drupal 8.4.x and will be removed before Drupal 9.0.0. Instead, use Drupal\migrate\Plugin\migrate\process\SubProcess"

Issue #2469799 by Adita, Xano, Girish-jerk: improve documentation and type hinting of FormValidatorInterface and FormValidator

Issue #2950127 by owenbush, Yogesh Pawar, msankhala, Wim Leers, vaplas: Add helpful reason for 'update' and 'delete' access not being allowed to FileAccessControlHandler

Issue #2940830 by Sam152, catch, amateescu, timmillwood: Provide explicit test coverage for isDefaultRevisionPublished and its usage within ModerationStateFieldItemList

Issue #2924338 by hchonov, cburschka, RoSk0, asherry, Wim Leers: Entity::uriRelationships() throws exceptions if an URL cannot be generated because of missing mandatory parameters

Issue #2594669 by Wim Leers, borisson_, catch, dawehner: LibraryDependencyResolver::getMinimalRepresentativeSubset() accepts a set as the input but doesn't complain if it's not actually a set

Issue #2869825 by justafish, dawehner, alexpott, martin107, jibran, Lendude, Mixologic, michielnugter, droplet, drpal, lauriii, effulgentsia, mglaman: Leverage JS for JS testing (using nightwatch)

Issue #2935255 by Jo Fitzgerald, kim.pepper, voleger, alexpott, martin107, jibran, catch: Remove all usages of drupal_get_message and drupal_set_message in core lib

Issue #2969718 by runeasgar, alexpott: The quick-start script could make it clearer than Ctrl+C is used to kill the server

Issue #2970026 by digdanlow: Fix "Passing a Session object to the ExpectationException constructor is deprecated as of Mink 1.7. Pass the driver instead."

Issue #2969807 by jmikii: Fix "LinkField is deprecated in Drupal 8.3.x and will be be removed before Drupal 9.0.x. Use \Drupal\link\Plugin\migrate\field\d7\LinkField instead." deprecation message

Issue #2969549 by marcel66, martin107: Fix "The $published parameter is deprecated since version 8.3.x and will be removed in 9.0.0." deprecation

Issue #2969972 by mihai11: Fix "The Drupal\taxonomy\Entity\Term::getVocabularyId method is deprecated since version 8.4.0 and will be removed before 9.0.0. Use Drupal\taxonomy\Entity\Term::bundle() instead to get the vocabulary ID." deprecation message

Issue #2752961 by dawehner, Wim Leers, Jo Fitzgerald, chr.fritsch, bradjones1, anavarre, greg.1.anderson, Berdir, moshe weitzman, alexpott, bkosborne, Crell, msonnabaum, joelpittet, catch, deviantintegral, lauriii, cilefen, effulgentsia, xjm: No reliable method exists for clearing the Twig cache