Issue #2596043 by mpdonadio, pjonckiere: DrupalDateTime constructor claims to support \DateTime object - it should not

Issue #2601682 by krknth, rakesh.gectcr, anil280988, jhodgdon: Unnecessary @param tags & Missing variable names in block, block_content module

Issue #2596083 by Wim Leers, lokapujya, jamin_melville: Allowed attribute 'class' not respected in CKEditor: ACF strips it

Issue #2549951 by Wim Leers: Document how to specify multiple CSS classes for CKEditor's styles dropdown

Issue #2604618 by andypost, xjm: Views operations dropbuttons do not work with Comment because it does not specify a list builder

Issue #2491875 by joachim, xjm, Xano, alexpott: EntityViewsData adds Operations links to all entities, which won't work if the entity type has no list builder, leading to WSOD on some views

Issue #2598488 by NickWilde: Views Page display menu expanded option is not included and gets destroyed by cache-rebuild

Issue #2590403 by Wim Leers: Remove "Open in new window" checkbox from EditorLinkDialog — Was: "Consider whitelisting <a>'s target attribute in the Standard install profile"

Issue #2594909 by rakesh.gectcr, krknth, jhodgdon: Missing @return tags in function/method comments in the core/modules folder

Issue #2603296 by heykarthikwithu: 'hook_shortcut_default_set' hook's docblock return can be improved

Issue #2453551 by mbovan, edurenye, Berdir, Saphyel, jhodgdon: TranslationLanguageRenderer tries to add langcode field to the view for entity types that have no langcode

Issue #2602380 by jonhattan: Innacurate exception message: The "%s" entity cannot have a URI as it does have an ID

Issue #2603786 by joelpittet, Wim Leers, Fabianx: Make Renderer(Interface)::renderPlaceholder() public

Issue #2575703 by borisson_, stefan.r, Berdir, joshi.rohit100: Remove default fall-through from PlaceholderTrait::placeholderFormat()

Issue #2602662 by mikeryan, phenaproxima: Feed ID should be required base field for aggregator items

Issue #2597628 by plach, jhedstrom, alexpott, Gábor Hojtsy: Enabling translation for menu links / taxonomy terms results in "Entity/field definitions" -- "Mismatch detected" on reports/status page

Issue #2600152 by Cottser, dawehner: Make ThemeRegistryLoader only throw an error when $throw is true

Issue #2589829 by rakesh.gectcr, joshi.rohit100, yched, Arla: Missing return $this in FieldConfigBase::setSetting and setConstraints

Issue #2540870 by joelpittet, lauriii: Improve the |safe_join Twig to be inline with twig_join_filter()

Issue #2541344 by Wim Leers, borisson_, DietrichM, Xano, tim.plunkett, alvar0hurtad0, joshi.rohit100: BlockBase subclasses should merge their cache tags/contexts with the parent's (BlockBase's)

Issue #2590105 by webflo, phenaproxima, snehi, alexpott: Fix undefined variable in d6_field migration

Issue #2596793 by phenaproxima, penyaskito, svendecabooter: Migrate legacy languages to configurable language entites

Issue #2337191 by tim.plunkett, dawehner, jibran, yched, Wim Leers, catch: Split up EntityManager into many services

Issue #2599156 by nicrodgers, snehi, jhodgdon: Several methods in node.module are missing return type documenation

Issue #2599442 by jhodgdon, heykarthikwithu, Himanshu5050, eojthebrave, metzlerd: Document common form/render element properties

Issue #2599524 by blackra, krknth, jhodgdon, rhett.prichard: Fixing order of documentation sections for /core/lib/Drupal