Issue #2609680 by alexpott, jhedstrom: Add an AssertMailTrait to allow mail testing in Kernel tests and fix odd stdout not found in test output

Issue #2572545 by pguillard, snehi, peezy, lokapujya, mahavir003, miteshmap, harsha012, hosttor, Manjit.Singh, HezzieB, jhodgdon: Update the UI texts for the Custom Block module

Issue #2676816 by xjm: Consolidate miscellaneous docs from class @file docblocks into the class docblocks

Issue #2608692 by snehi, r_sharma08, anil280988, marvin_B8, rakesh.gectcr, ashhishhh, malavya, heykarthikwithu, kaushalkishorejaiswal, jhodgdon: Revise docblock for BookManager methods

Issue #2626106 by Wim Leers, gceja, thpoul: The image button does not work unless width+height attributes are allowed, even though those are optional

Issue #2471689 by klopez, shashikant_chauhan, harings_rob, snehi, jhodgdon: Entity API documentation should consistently refer to handlers rather than controllers

Issue #2676472 by micaelamenara, jhodgdon: docs for t() and related functions don't explain how context works

Issue #2679903 by thpoul, Dave Reid, Wim Leers: CKEditor uses separate cache-busting query string from Drupal's

Issue #2572125 by rodrigoaguilera, vijaycs85, swentel, Berdir, Wim Leers, tstoeckler: Content translation local tasks are not getting displayed due to caching

Issue #2670444 by Wim Leers: Embedded AJAX responses aren't application/json, but application/vnd.drupal-ajax

Issue #2581407 by davidhernandez, LewisNyman, emma.maria, Saphyel: Remove the obsoletely named Classy library attached to Bartik's comment.html.twig as Bartik uses its own styles.

Issue #2681753 by lluvigne, subharanjan, cilefen: "Permissions page" link in Admin > Appearance is hardcoded and breaks on subdirectory setup

Issue #1836384 by Lendude, pguillard, dawehner, damiankloip, hynnot, tadityar, anil280988, jain_deepak, gaurav_varshney: The views UI should display "All Displays" option only when there are more 1 displays

Issue #2679867 by Wim Leers, mr.baileys: BigPipe causes PHP notices with JavaScript disabled on error pages

Issue #2604974 by Chi, tstoeckler, dcrocks, Edit Olah: Hide "Powered by Drupal" block title by default

Issue #2679096 by Berdir, dawehner, tim.plunkett: Convert Kernel Tests in Drupal\system\Tests\Entity to phpunit

Issue #2672512 by Birk, kurund: CKEditorPluginConfigurableInterface::settingsForm() docs don't match API usage

Issue #2665738 by droplet, zviryatko: jQuery Autocomplete applies "_renderItem" option only for first element on the page

Issue #2678628 by Wim Leers: Consider removing the BigPipe no-JS cookie when JS is enabled again in a browser

Issue #2626570 by Wim Leers, thpoul, DuaelFr: Drupal 8's custom Image and Link plugins do not include a HiDPI icon

Issue #2678574 by dawehner: Symfony 2.8 requirements change: required PHP "iconv" extension is nowhere documented

Issue #2412569 by claudiu.cristea, amateescu, yched, jibran, epari.siva: Allow setting the auto-create bundle on entity reference fields with multiple target bundles

Issue #2678550 by imrancluster: Need full stop (.) for description field's help text in Add comment type' section