Issue #2262483 follow-up by sun: Fixed Some PHPUnit tests do not exist.
Issue #1989568 by Berdir: Remove block config ID from being used as an HTML ID or template suggestion.
Issue #2216541 by jhodgdon, Gábor Hojtsy: Fill in topic/@defgroup docs for Internationalization overview.
Issue #1428784 by ivasyk.orest, joshi.rohit100, tim.plunkett, martin107, Rajendar Reddy, visabhishek, wiifm, joachim: Document field data hooks: hook_field_views_data[_alter](), hook_field_views_data_views_data_alter().
Issue #2277945 by Jose Reyero: Fixed Typed configuration implements TypedDataInterface improperly.
Issue #2279363 by tstoeckler: Fixed file_managed.uri should not specify a prefixed unique key.
Issue #2238217 by effulgentsia, neclimdul, martin107, tim.plunkett, cweagans, kim.pepper, xjm: Introduce a RouteMatch class.
Issue #2291777 by alexpott: Fixed Random fail in LanguageFallbackTest.
Issue #2290157 by marcingy: Convert comment_user_predelete query to entity query.
Issue #2291445 by marcingy: Convert comment_entity_predelete query to entity query.
Issue #2183957 by vijaycs85, chx, Gábor Hojtsy: Provide configuration schema for Migration module.
Issue #2288499 by er.pushpinderrana | jhodgdon: Fixed Action plugin classes need more docs links.
Issue #2226267 by yched: Improve default value handling of fields to be consistent (follow-up).
Issue #2286357 by tim.plunkett: Introduce Display Variants, use for the block rendering flow.
Issue #2216539 by jhodgdon, dawehner: Fill in @defgroup/topic docs for Views overview.
Issue #2216559 by jhodgdon: Repurpose @defgroup/topic docs for Architecture Overview.
Issue #2161801 by YesCT, vijaycs85, fran seva, batigolix, ifrik: Update hook_help for Config translation module.
Issue #2216563 by jhodgdon: Fill in @defgroup/topic docs for Object Oriented Programming overview.
Issue #2290285 by jhodgdon: Condition plugin classes need more links/docs.
Issue #2292025 by tim.plunkett: Convert BreadcrumbBuilderInterface applies() and build() to use RouteMatch.