Issue #2567801 by Wim Leers, lauriii: Deprecate core/modules/editor/js/editor.admin.js JS APIs in Drupal 10, for removal in Drupal 11

Issue #3421012 by sorlov, quietone, sakthi_dev, mstrelan, Wim Leers: Convert Filter plugin discovery to attributes

Issue #3328457 by xjm, dimitriskr: Replace most substr($a, $i) where $i is negative with str_ends_with()

Issue #3410303 by longwave, Luke.Leber, Wim Leers, quietone, dslatkin: FilterHtml data loss when iframe and/or textarea is allowed

Issue #2441811 by longwave, daffie, andypost, edurenye, lauriii, joseph.olstad, Wim Leers, smustgrave, effulgentsia, alexpott, larowlan, chx, jibran: Upgrade filter system to HTML5

Issue #3328443 by xjm, rpayanm, alexpott, catch, longwave: Replace most strpos() === 0 or !== 0 with str_starts_with()

Issue #3185640 by lucienchalom, jungle, smustgrave, ravi.shankar, andregp, xjm, quietone, sergiogsanchez: Fix or ignore words that start with "v", excluding real non-English words

Issue #3278636 by nod_, Wim Leers, mrinalini9, bnjmnm: HTMLRestrictions::fromString() bug: multiple occurrences of same tag results in only last one being respected

Issue #3268983 by nod_, iSoLate, plach, Wim Leers, acbramley, larowlan, scott_euser, catch: [regression] FilterHtml throws Unsupported operand types error when * used in tag attribute

Issue #3228334 by Wim Leers, larowlan, lauriii, DieterHolvoet, beatrizrodrigues: Refactor HTMLRestrictionsUtilities to a HtmlRestrictions value object

Issue #3106216 by Spokje, longwave, alexpott, apaderno, Hardik_Patel_12, daffie: Remove unused variables from core

Issue #3224478 by ankithashetty, varshith, longwave, platinum1: Update HTML specification link for /filter/tips

Issue #3151101 by Deepak Goyal, dww, ravi.shankar, shetpooja04, alexpott, quietone: Replace use of whitelist/blacklist in Filter module

Issue #2572613 by Malevi4, idebr, pfrenssen, Mile23, RajeevK: Fix 'Drupal.Array.Array.CommaLastItem' coding standard

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 #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 #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 #2656278 by alexpott, miteshmap, droplet, walangitan, empesan, ejb503, manmohandream, vaidehi bapat, gadaniels72, swentel, jamesdesq, luca_cracco, malaimo29001, Wim Leers, nileema.jadhav: Convert "Limit allowed HTML tags" input field to a textarea

Revert "Issue #2704871 by pepegarciag, ieguskiza, snehi, gaurav.pahuja, rajeshwari10, dimaro, gargsuchi, pashupathi nath gajawada, penyaskito, Manuel Garcia, Mile23: Replace usages of deprecated method drupal render()"

This reverts commit ae3ee317.

Issue #2704871 by pepegarciag, ieguskiza, snehi, gaurav.pahuja, rajeshwari10, dimaro, gargsuchi, pashupathi nath gajawada, penyaskito, Manuel Garcia, Mile23: Replace usages of deprecated method drupal render()

Issue #2572693 by Mile23, andriyun, andypost, attiks: Fix 'Drupal.ControlStructures.ControlSignature' coding standard

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Revert "Issue #2656278 by miteshmap, walangitan, empesan, ejb503, manmohandream, vaidehi bapat, gadaniels72, luca_cracco, swentel, malaimo29001, nileema.jadhav, sidharthap: Convert "Limit allowed HTML tags" input field to a textarea"

This reverts commit 53766025.

Issue #2656278 by miteshmap, walangitan, empesan, ejb503, manmohandream, vaidehi bapat, gadaniels72, luca_cracco, swentel, malaimo29001, nileema.jadhav, sidharthap: Convert "Limit allowed HTML tags" input field to a textarea

Issue #2579471 by walangitan, droplet, biguzis, thorandre, swentel: Allow more chars in "Limit allowed HTML tags" filter

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

Issue #2579357 by pwolanin: Fix text for "Limit allowed HTML tags" filter to also indicate it restricts HTML attributes

Issue #2549077 by pwolanin, Wim Leers, phenaproxima, lauriii: Allow the "Limit allowed HTML tags" filter to also restrict HTML attributes, and only allow a small whitelist of attributes by default

Issue #2570355 by Sutharsan, stefan.r, kgoel, josephdpurcell, joelpittet, justAChris, dawehner, pfrenssen, pwolanin, David_Rothstein, catch: Replace remaining !placeholder and @placeholder with :placeholder for URLs

Issue #2560641 by alexpott, lauriii, Xano, borisson_, ianthomas_uk, olli: Remove all usages SafeMarkup::checkPlain() from render arrays

Revert "Issue #2560641 by alexpott, lauriii, Xano, borisson_, ianthomas_uk: Remove all usages SafeMarkup::checkPlain() from render arrays"

This reverts commit 31007609.

Issue #2560641 by alexpott, lauriii, Xano, borisson_, ianthomas_uk: Remove all usages SafeMarkup::checkPlain() from render arrays

Issue #2504529 by joelpittet, alexpott, catch: SafeMarkup does not escape some filter tips - remove SafeMarkup usage from FilterHtml

Issue #2521906 by mErilainen, LewisNyman, Bojhan, eliza411, ivanstegic, lunk_rat, nickrosencrans, stpaultim, Mark LaCroix, webchick: Add default configuration to support h2-h6 level headings

Issue #2346209 by keopx, Zekvyrin, subhojit777, cburschka, pguillard, dimaro, realityloop, m4olivei, joelpittet, rteijeiro, idebr: /filter/tips improperly escaped

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2089331 by grom358 | thedavidmeister: [meta] Replace calls to check_plain() with Drupal\Component\Utility\String::checkPlain().

Issue #2217877 by Wim Leers, Dave Reid, damiankloip, xjm, chx | catch: Fixed Text filters should be able to add #attached, #post_render_cache, and cache tags.