Issue #2566335 by damiankloip, dawehner: Context data is not passed to normalize() field calls in ComplexDataNormalizer

Issue #2539472 by mikeker, mondrake, harings_rob: Pager "first" and "previous" links have incorrect URLs

Issue #2495301 by Mile23, mohit_aghera, JeroenT, dcmul, naveenvalecha, borisson_, cilefen, alivadniy, andypost, xjm: Deprecate user_format_name() and the label_callback for 9.x (not 8.x)

Issue #2564283 by alexpott, stefan.r, joelpittet: Remove use of SafeMarkup::checkPlain() from adminSummary() and adminLabel() in views plugins

Issue #2506445 by joelpittet, Ryan Weal, Sutharsan, alexpott, subhojit777, justAChris, nlisgo, effulgentsia, rpayanm, larowlan, chx, xjm, dawehner, geertvd, lauriii, izus, andypost, borisson_, Sharique: Replace !placeholder with @placeholder in t() and format_string() for non-URLs in tests

Issue #2512306 by StryKaizer, bojanz, googletorp, JeroenT, borisson_, tim.plunkett: Inline errors not shown for details elements

Issue #2415335 by phenaproxima, miguelc303, quietone, mikeryan: Migration Files for Drupal 7 Custom Blocks

Issue #2567857 by dawehner, joelpittet, chx: Remove !placeholder in NodeRevisionUiTest and make it actually test the expected output

Issue #2353703 by quietone, phenaproxima, miguelc303, ksenzee: Variable to config: forum.settings [d7]

Issue #2566447 by stefan.r, joelpittet, alexpott, lauriii, dawehner: Cast safe string objects to string or use assertEqual() in some assertIdentical() comparisons

Issue #2568085 by plach, alexpott, dawehner, Berdir: Lock Twig on ~1.21.2 until we are able to upgrade to 1.22.0

Issue #2492839 by joelpittet, mikeker, dawehner, lauriii, plach, Fabianx, olli: Views replacement token bc layer allows for Twig template injection via arguments

Issue #2567159 by joelpittet, effulgentsia, stefan.r, xjm, dawehner: Fix improper usage of t() in ViewsBlock

Issue #2567851 by dawehner, joelpittet: Use assertText() instead of t()/SafeMarkup::format() in NodeEditFormTest

Issue #2567139 by Cottser, stefan.r, joelpittet: Twig autoescape default strategy deprecation error triggered on every page load

Issue #2451397 by Jaesin, damiankloip, alexpott, dawehner: Entity denormalization fails to retrieve bundle

Issue #2566597 by Cottser, LewisNyman, mdrummond, pjbaert, jaxxed, ManuelGarcia, emma.maria, maked1sky, davidhernandez: [Mega patch] Move system *.theme.css files to Classy

This reverts commit 7cabfeee.

This reverts commit fb07e7bb.

Issue #2561259 by stefan.r, lauriii, joelpittet, andypost: Cast (optgroup) array keys that may hold translated strings to string

Issue #2444615 by borisson_, neclimdul, jibran, dawehner, jhedstrom, Fabianx: Move testing packages to require-dev in composer.json

Issue #2533746 by Gábor Hojtsy, webflo, tstoeckler, Jose Reyero: Remove the the ability to translate locked date formats (e.g. html_datetime)

Issue #2565981 by joelpittet, alexpott, Gábor Hojtsy, tstoeckler: Remove $this->t() and SafeMarkup::format() in SelectLanguageForm

Issue #2492967 by dawehner, cilefen, greggles, larowlan, hussainweb, chx, bircher, mr.baileys, webchick, Berdir, Fabianx, catch, pwolanin, Crell: SQL layer: $match_operator is vulnerable to injection attack