Issue #2865971 by alexpott, droplet, xjm, martin107, joelpittet, Cottser, idebr, Mile23: Use stylelint as opposed to csslint in core

Issue #2878548 by alexpott, droplet, Cottser, idebr, joelpittet, xjm, martin107: Fix CSS whitespace issues

Issue #2831274 by slashrsm, seanB, Wim Leers, chr.fritsch, phenaproxima, naveenvalecha, marcoscano, webflo, Gábor Hojtsy, amateescu, Boobaa, iMiksu, mtodor, effulgentsia, xjm, Berdir, tim.plunkett, dawehner, tkoleary, tstoeckler, tedbow, alexpott, yoroy, catch, Bojhan, andypost, jhedstrom, jibran, aspilicious, boztek, cbr, bigbaldy, alex0412, dagmar, blueminds, ekes, Dave Reid, Sam152, bojanz, pixelmord, jonathanshaw, CTaPByK, webchick, samuel.mortenson, dbt102, dishabhadra, proweb.ua, rakesh.gectcr, rasikap, paranojik, pameeela, neardark, NormySan, Primsi, nicolas.rafaelli, romainj, royal121, vladan.me, vpeltot, woprrr, vilepickle, toni04, scheban, tduong, temkin, tim-e, mbovan, mashermike, felribeiro, giancarlosotelo, hctom, euphoric_mv, eric.duran7@gmail.com, edurenye, eelkeblok, H1ghlander, Jaesin, hkirsman, ja_ca, NickWilde, joachim, joshi.rohit100, marcingy, NerOcrO, Mixologic, jcisio, jfrederick, Lukas von Blarer, Maouna: Bring Media entity module to core as Media module

Issue #2844595 by ohthehugemanatee, Jo Fitzgerald, heddn, moshe weitzman: SQLBase breaks GROUP BY queries

Issue #2874878 by zengenuity, LoMo, alexpott: Status Report is not clear when cron job is not running or PHP memory limit too low

Issue #2826268 by Lendude, LoMo, dawehner: Don't fatal on rss feeds when the page display is disabled

Issue #2852608 by Manuel Garcia, DyanneNova, markconroy, tim.plunkett, joelpittet, DickJohnson, Scorpid: Review layout CSS and markup

Issue #2876357 by michielnugter, Lendude, jonathan1055: Incomplete test coverage on AssertLegacyTrait field assertions

Issue #2804391 by Berdir, Jo Fitzgerald, amateescu, gaurav.kapoor, arunkumark, wolffereast: Resaving menu links that points to a non-node entity changes the type to node and breaks the link

Issue #2848120 by kristiaanvandeneynde, tim.plunkett, Pavan B S, tstoeckler: Short term fix: Make ContentTranslationController recognize 'add' and 'edit' form handlers

Issue #2848508 by timmillwood, dragos-dumi, Sam152, Pavan B S, pradeep22saini: Reverting a revision causes validation error on edit form submit

Issue #2865497 by quietone, pritish.kumar, Jo Fitzgerald, moshe weitzman, phenaproxima: Fix high-water condition for new migrations

Issue #2853509 by alexpott, xjm, nod_, dmsmidt, dawehner, catch, graber: Don't render status messages if there are no messages but also include their assets if there might be

Issue #2845364 by Wim Leers, EAnushan: Test coverage to show that as a non-administrator, you're able to modify the 'name' field, but only if you have the 'change own username' permission

Issue #2293697 by Wim Leers, dawehner, Jo Fitzgerald, clemens.tolboom, vedpareek, tedbow, Munavijayalakshmi, hchonov, alexpott, effulgentsia, tstoeckler, Crell, klausi, EclipseGc: EntityResource POST routes all use the confusing default: use entity types' https://www.drupal.org/link-relations/create link template if available

Issue #2862749 by Jo Fitzgerald, phenaproxima, quietone: Add documentation to EntityViewMode destination plugin

Issue #2761639 by Leksat, Wim Leers, Berdir, hitfactory, stella: PageCache should not use $request->getUri()

Issue #2870513 by michielnugter, alexpott, xjm, dawehner, dagmar, Lendude, Gábor Hojtsy: New initiative leads for the PHPUnit initiative

Issue #2849100 by vaplas, hugovk, tameeshb, droplet, NikitaJain, Dinesh18, Truptti, xjm, wturrell: Spaces shown before commas in publishing options

Revert "Issue #2870513 by michielnugter, xjm, dawehner, dagmar, Lendude, Gábor Hojtsy: New initiative leads for the PHPUnit initiative"

This reverts commit abd69ef0.

Issue #2877593 by alexpott, Berdir, Wim Leers: Improve \Drupal\hal\LinkManager\RelationLinkManager::getRelations() documentation

Issue #2869415 by Wim Leers, tstoeckler, dawehner: EntityResourceTestBase::getUrl() overrides BrowserTestBase::getUrl(), yet offers different functionality

Issue #2876428 by hardik.p, joachim, c.nish2k3: Documentation for LocalTaskManager::getLocalTasks() is incorrect