(cherry picked from commit a7b67e7a)

Issue #2745953 by dawehner, tim.plunkett, Wim Leers: AjaxBasePageNegotiator should not require _theme: ajax_base_page to be specified

Issue #2327941 by Wim Leers, Sonal.Sangale: Simplify in-place editor selection (Was: Refactor PlainTextEditor/WysiwygEditor/Editor in-place editors now that text fields no longer have configurable filteredness)

Issue #2490136 by timmillwood, Manjit.Singh, xjm, webchick, dixon_, Bojhan, googletorp, dawehner, cilefen, jstoller, mikeburrelljr, naveenvalecha, giorgio79, platinum1, Crell, markdorison, skwashd, moshe weitzman, amateescu, jhedstrom, nateswart: Enable revisions by default

Issue #2719695 by alexpott, Mile23: Fix 'Drupal.Classes.ClassDeclaration.CloseBraceAfterBody' coding standard

Issue #2572777 by andypost, alexpott, attiks, andriyun: Fix 'Squiz.Strings.ConcatenationSpacing' coding standard

Issue #2456477 by Berdir, dawehner, heddn, pguillard: Convert deprecated \Drupal\simpletest\KernelTestBase tests to KernelTestBaseNG

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

Issue #2528498 by Wim Leers, Jacine, mortendk: Only emit Quick Edit data- attributes when actually necessary

Issue #2672604 by saurabh.tripathi.cs: Replace deprecated usage of entity_create('taxonomy_term') and entity_create('taxonomy_vocabulary') with a direct call to Term::create() and Vocabulary::create()

Issue #2669400 by jungle, dimaro, rakesh.gectcr, lluvigne, Mile23: Replace deprecated usages of entity_create('type') with a direct call to <EntityType>::create()

Issue #2664466 by dawehner, alexpott, kostyashupenko: url_alias table is only used by a core service but it depends on system install

Issue #2503379 by Mac_Weber, DuaelFr, lluvigne, naveenvalecha, jmolivas: Replace deprecated usage of entity_create('filter_format') with a direct call to FilterFormat::create()

Issue #2641584 by Mac_Weber, heykarthikwithu, legovaer: Replace deprecated usage of  entity_create('field_config') with a direct call to FieldConfig::create()

Issue #2641586 by Mac_Weber, marvin_B8: Replace deprecated usage of  entity_create('field_storage_config') with a direct call to  FieldStorageConfig::create()

Issue #2548195 by nod_, JohnAlbin, madhavvyas, sriharsha.uppuluri: Only use single quotes in JavaScript and update .eslintrc

Issue #2429191 by claudiu.cristea, amateescu, yched, nlisgo, Berdir, alexpott, klausi, Wim Leers, xjm, catch: Deprecate entity_reference.module and move its functionality to core

Issue #2454649 by Aki Tendo, dawehner: Cache Optimization and hardening -- [PP-1] Use assert() instead of exceptions in Cache::merge(Tags|Contexts)

Issue #2568099 by Wim Leers, mdrummond, mortendk: Follow-up for #2407739: Remove the js-quickedit-main-content class that was added in favor of relying on <main>

Issue #2559955 by Wim Leers, swentel, mdrummond: Ensure that Quick Edit relies less on the structure of the HTML

Issue #2576037 by unqunq, er.manojsharma, sdstyles, martins.kajins, Devaraj johnson, cilefen, Bojhan, Wim Leers: "Sorry" in user-facing errors violates the User Interface Standards

Issue #2090983 by plach, Berdir, yched: ContentEntityInterface::getTranslation() should throw an exception when an invalid language is specified

Issue #2576533 by alexpott, stefan.r, Wim Leers, dawehner, xjm, effulgentsia, catch: Rename SafeStringInterface to MarkupInterface and move related classes

Issue #2550225 by swentel, yched, Wim Leers, aspilicious: quickedit_test_entity_view_alter() creates a non compliant field render array

Issue #2560783 by stefan.r, joelpittet, lauriii, Cottser, Sutharsan, kgoel, justAChris, Gábor Hojtsy, dawehner, jhodgdon, effulgentsia, xjm, andypost, googletorp: Replace !placeholder with :placeholder for URLs in hook_help() implementations

Issue #2407739 by mortendk, davidhernandez, rteijeiro, lduerig, sivaji@knackforge.com: Remove classes from system templates r*.html.twig

Issue #2551105 by Dave Reid: BaseCommand should not be in the quickedit namespace, useful for anything

Issue #2559969 by alexpott: Make SafeStringInterface extend \JsonSerializable so we don't have to do so much string casting

Issue #2551263 by Berdir, nod_: Deleting entity/field models when markup is removed can result in JS error

Issue #2214241 by mortendk, mdrummond, lauriii, galooph, ShaunDychko, jjcarrion, b0unty, joelpittet, scor, amitgoyal, aboros, Manuel Garcia, hkirsman, BLadwin, hussainweb, sushilkr, emma.maria, nlisgo, yched, LewisNyman, davidhernandez, mikl, camoa, dman, dodorama: Field default markup - removing the divitis