(cherry picked from commit 1694030b)

Issue #2701769 by snufkin: Missing @return documentation from ContentTranslationHandler::entityFormTitle

Issue #1996130 by dawehner, damiankloip, dagmar, marthinal, clemens.tolboom, Nitesh Sethia: REST views: not adding dependencies on Serializer providers

Issue #2726837 by tim.plunkett, dipakmdhrm, dawehner: \Drupal\Core\Plugin\DefaultSingleLazyPluginCollection::addInstanceId should set $this->instanceId

Issue #2708509 by damiankloip, dawehner, amateescu: custom_storage does not work on field types with a storage schema already

Issue #2546248 by scythian, XaviP, darrenwh, mikebell_, ingaro, urbanlegend, jhodgdon, davidhernandez, andypost, joelpittet, emma.maria, cdykstra, Cottser, LewisNyman, joachim: Use consistent style to mention HTML tags in code comments

Issue #2713831 by vegantriathlete, lisa.ugray, joshi.rohit100, jhodgdon, deviantintegral, kellyimagined, alexpott, akalata, soulsesa: Document #machine_name exists parameters

Issue #2730129 by klausi, jibran, dawehner: DrupalKernel must never persist service_container for Symfony 3 update

Revert "Issue #2730129 by klausi, jibran, dawehner: DrupalKernel must never persist service_container for Symfony 3 update"

This reverts commit bfdc7b52.

Issue #2730129 by klausi, jibran, dawehner: DrupalKernel must never persist service_container for Symfony 3 update

Issue #2626298 by marthinal, borisson_, Wim Leers, dawehner: REST module must cache only responses to GET requests

Issue #2729439 by Wim Leers, Berdir: QueryArgsCacheContext should return a special value for ?arg (without value)

Issue #2724407 by mpdonadio: NodePreviewForm unnecessarily explicitly implements ContainerInjectionInterface

Issue #2721355 by alexpott, neclimdul, Mile23: MissingDependentModuleUnitTest has the wrong namespace

Issue #2721887 by snehi, Sonal.Sangale, gaurav.pahuja, Ashish.Dalvi, jhodgdon, joachim, Mile23: Docs topic 'File interface' contains obsolete data

Issue #2729171 by Vinay15, kiamlaluno, jhodgdon: callback_batch_operation() code still contains Drupal 6 code

Issue #2725415 by catch, Berdir, Wim Leers, xjm, juhaszg, cmanalansan: Text Editor module fails to track usage of images uploaded in text_with_summary fields, allows uploaded images to be deleted

Issue #2723589 by Ashish.Dalvi, gaurav.pahuja, marvin_B8, valthebald: Remove entity_load* usage for filter_format entity type

Revert "Issue #2723589 by Ashish.Dalvi, gaurav.pahuja, marvin_B8, valthebald: Remove entity_load* usage for filter_format entity type"

This reverts commit 39498e7d.

Issue #2687897 by dawehner, jhedstrom, catch, jibran, Berdir, klausi: Convert system module's kernel tests to NG

Issue #2724553 by snehi, Sonal.Sangale, er.pushpinderrana, jhodgdon, e.r.n.i.e: Chapter "Change file system storage settings" in INSTALL.txt needs to be adapted to Drupal 8

Issue #2568287 by latikas, rashid_786, drnikki, anavarre, miteshmap, cilefen: NodeEditFormTest::testNodeEdit() sets  but uses it only once

Issue #2723589 by Ashish.Dalvi, gaurav.pahuja, marvin_B8, valthebald: Remove entity_load* usage for filter_format entity type

Issue #2646328 by alexpott, Wim Leers, David_Rothstein, aaronott, Ayesh: CSRF in update module manual check links

Issue #1266748 by swentel, Berdir, jcnventura, arlinsandbulte, yched, amateescu, droplet: Changing cardinality lower than highest existing delta causes data loss upon save

Issue #2617152 by Chi, alexpott, dawehner: Single import form needs to handle invalid YAML correctly and not with an exception

Issue #2605654 by Mile23, donquixote, dawehner, alexpott, catch: Modify Drupal\Core\Extension\ExtensionDiscovery to allow for scanning multiple file systems, enabling vfsStream testing

Issue #2285311 by joelpittet, tomatkins, susannecoates: Theme's "Path to custom logo" always validated even if "Use the default logo" is set

Revert "Issue #1266748 by swentel, Berdir, jcnventura, arlinsandbulte, yched: Changing cardinality lower than highest existing delta causes data loss upon save"

This reverts commit ee5274af.