Issue #2958862 by msankhala, jhodgdon, joachim: Sample code needs to have namespace on the Url class

Issue #2958407 by alexpott: Properly deprecate SafeMarkup::isSafe, SafeMarkup::checkPlain and the SafeMarkup class

Issue #2857857 by vegantriathlete, Jo Fitzgerald, snehi, plach, xjm, Skabbkladden: Check use of "it's" in core to ensure proper use

Issue #2346893 by lauriii, idebr, slashrsm, RavindraSingh, Rade, Fabianx, alexpott, swentel, gauravjeet, darrenwh, deepak_zyxware, joelpittet, Wim Leers, Yogesh Pawar, Vj, ivan.chavarro, josephdpurcell, josmera01, rloos289, kattekrab, Tanvish Jha, csakiistvan, xjm, larowlan, akalata: Duplicate AJAX wrapper around a file field

Issue #2853503 by Aki Tendo, alexpott, larowlan, Wim Leers, klausi, fgm, dawehner, mondrake, catch, Berdir, neclimdul, borisson_: Remove all assert('string') calls from Drupal core because deprecated in PHP 7.2

Issue #2662574 by RajeevK, Adita, pritish.kumar, afi13, greyghost, tstoeckler, xjm, Cottser, dawehner: Theme suggestions may not be in theme include files, Search and Views UI suggestions are not (always) found

Revert "Issue #2662574 by RajeevK, Adita, pritish.kumar, afi13, AjitS, greyghost: Theme suggestions may not be in theme include files, Search and Views UI suggestions are not (always) found"

This reverts commit 81d17351.

Issue #2662574 by RajeevK, Adita, pritish.kumar, afi13, AjitS, greyghost: Theme suggestions may not be in theme include files, Search and Views UI suggestions are not (always) found

Issue #2563069 by DuaelFr, ecarty, idebr: Unclosed conditional comments in html tag result in broken html head

Issue #2901562 by mfernea, Jo Fitzgerald, Yogesh Pawar, 3ssom, Mile23, borisson_: Fix 'Squiz.WhiteSpace.SuperfluousWhitespace' coding standard

Issue #2784443 by tedbow, Wim Leers, Cottser, tim.plunkett, droplet, drpal, nod_, lauriii: Move off-canvas functionality from Settings tray module into drupal.dialog.ajax library so that other modules can use it

Issue #2901726 by mfernea, gmario, finn.lewis, robertoperuzzo, rachel_norfolk: Fix 'Squiz.Functions.MultiLineFunctionDeclaration' coding standard

Issue #2877480 by Yogesh Pawar, hardik.p, eojthebrave, Cyberschorsch: Update #cache example code on Render API overview to use Node::getCacheTags instead of hard coding

Issue #2572791 by Mile23, andriyun, attiks, RoSk0: Fix 'Drupal.WhiteSpace.OpenBracketSpacing' coding standard

Issue #2901739 by andriyun, Jo Fitzgerald, mfernea, xjm: Fix 'Squiz.Arrays.ArrayDeclaration' coding standard

Issue #1381140 by Lendude, himanshu-dixit, tameeshb, babruix, IRuslan, sun, blazey, esoteric1, mkalkbrenner, ceardach, dcam, bapi_22, dan2k3k4, tim.plunkett, Pavan B S, tanmayk, lomasr, xjm, andypost: A #default_value = 0 for #type radios checks all radios

Issue #2722609 by anoopjohn, mfernea, Jo Fitzgerald, chishah92, druprad, martin107, Mile23: Fix Drupal.Commenting.FunctionComment.ParamNameNoMatch

Issue #2893586 by Manuel Garcia, amateescu, vijaycs85, dawehner: Add #optional support to the Container render element

Issue #2704871 by pepegarciag, Mile23, Manuel Garcia, ieguskiza, snehi, gaurav.pahuja, dimaro, rajeshwari10, gargsuchi, pashupathi nath gajawada, penyaskito, xjm, ZeiP, Wim Leers, alexpott: Replace usages of deprecated method drupal_render()

Issue #2694535 by WidgetsBurritos, samuel.mortenson, Manuel Garcia, idebr, tstoeckler, metzlerd, larowlan: Support rect property and nested render arrays in html_tag for dynamic SVGs

Issue #2594553 by gambry, arshadcn, Sagar Ramgade, Yogesh Pawar, garnett2125, larowlan, lauriii: Add #maxlength to textarea in Form API

Issue #2883699 by prajaankit, ahmad.h.khalil, cilefen: hook_theme_suggestions_HOOK() is not clear enough about what should be returned

Issue #2875443 by pankajsachdeva, pritish.kumar, brentgees: Remove D7 links from D8 Render API documentation

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

This reverts commit 78ca5677.

Issue #2712647 by slasher13, klausi, catch, jibran, Manuel Garcia, alexpott, mpdonadio, naveenvalecha, neclimdul, timmillwood, webflo, dawehner, Wim Leers, pounard: Update Symfony components to ~3.2

Issue #2854909 by arshadcn: Update documentation for \Drupal\Core\Render\ElementInfoManagerInterface

Issue #2718655 by dawehner, Jo Fitzgerald, Wim Leers: #type actions with dropbutton loses bubbleable metadata

Issue #2845731 by ashish-deynap, vaplas, chiranjeeb2410, Munavijayalakshmi, tramsaal, xjm: Theming guide links are wrong

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2853684 by tameeshb, wturrell, chiranjeeb2410, krknth, Wim Leers, eojthebrave, leolando.tan, xjm: Update grammar of inline comments in \Drupal\Core\Render\Renderer::doRender

Issue #2803779 by pfrenssen, klausi, Mile23, alexpott, dawehner: Update Coder to 8.2.10 and fix errors from improved sniffs

Issue #665790 by chrisrockwell, Sumit kumar, lauriii, joelpittet, sun, vulcanr, vaplas, yoroy, leahtard, tompagabor, aspilicious, ckrina, Gábor Hojtsy, David_Rothstein, Manuel Garcia, rootwork, nod_, kostyashupenko, pguillard, Bojhan, droplet, typhonius, wturrell, mgifford, webkenny, cosmicdreams, tkoleary, YesCT, marcvangend, markabur, LewisNyman, mrfelton, oriol_e9g, prabhu9484, catch, hedrickbt, tsvenson, longwave, dww, kika, borisson_, rdellis87, realityloop, klonos: Redesign the status report page

Issue #2346773 by dmsmidt, lokapujya, klakegg, marcvangend, andrewmacpherson, ptsimard, Getekid, Rade, yoroy, tstoeckler, mgifford, tim.plunkett, estoyausente, xjm, PierreMarcel, hass, SKAUGHT, sukanya.ramakrishnan, flyke, alvar0hurtad0, bojanz, pwolanin, arunkumark, Bojhan, bleen: Details form element should open when there are errors on child elements

Issue #2559825 by tim.plunkett, Antti J. Salminen, lauriii, aspilicious, alexpott: Preprocess functions from base hooks not triggered for theme hooks not using the __  pattern