Issue #3109556 by finnsky, nod_, longwave, effulgentsia, Ambient.Impact: Update from Yarn 1 to Yarn 4

Issue #3426548 by Kingdutch, andypost, longwave, catch, mstrelan, alexpott: Convert the PHPStan baseline from NEON to PHP

Issue #3419734 by catch, nod_: [jQuery 4] jquery-form is unmaintained and not jQuery 4 compatible, fork it into core

Issue #3407360 by alexpott, xjm, longwave, quietone, smustgrave, mstrelan: Commit check script: nproc does not exist on Darwin

Issue #3397490 by quietone, smustgrave, xjm, longwave, poker10: Fix more words that are only misspelled in comments

Issue #3087630 by makbay, jungle, sahal_va, Abhijith S, Nikhil_110, smustgrave, longwave: Update the obsolete usage text inside core/scripts/update-countries.sh

Issue #3328741 by quietone, smustgrave, xjm, catch, alexpott, longwave: Add a dictionary for Drupal-specific words

Issue #3393475 by fjgarlin, catch: Enable running the same test multiple times on gitlab ci for random test failures

Issue #3388365 by catch, larowlan, bbrala, smustgrave: Distribute @group #slow tests between test runners and mark more tests

Issue #3386076 by fjgarlin, catch, longwave, larowlan, mstrelan, el7cosmos, RoSk0, xurizaemon, poker10, alexpott, bbrala, nick_schuch: GitLab CI integration for core

Issue #2921133 by quietone, VladimirAus, xjm, ankithashetty, longwave, Prem Suthar, smustgrave, benjifisher, AaronMcHale: Remove "Please" from the codebase

Issue #2707291 by Utkarsh_33, lauriii, darvanen, samuel.mortenson, hooroomoo, komalk, narendraR, Vidushi Mehta, sasanikolic, droplet, smustgrave, yoroy, Bcwald, kostyashupenko, penyaskito: Disable body-level scrolling when a dialog is open as a modal

Issue #3372789 by aaron.ferris, larowlan: run-tests.sh references a non existent obsolete Core module's (simpletest) url

Issue #2662330 by Utkarsh_33, lauriii, hooroomoo, bnjmnm, tim.plunkett, Alan D., smustgrave, catch, mrweiner: Machine name generation is way too slow

Issue #3344087 by longwave, Gauravvvv, mherchel, catch: Update Stylelint and Prettier for Drupal 10.1 and use Prettier for formatting PostCSS

Issue #3352635 by Spokje: Run yarn build:css in core/scripts/dev/commit-code-check.sh whenever core/package.json and/or core/package.lock change

Issue #3328454 by xjm, Bhanu951, jidrone, smustgrave: Replace most strpos() !== FALSE or === FALSE with str_contains()

Issue #3314151 by Wim Leers, phenaproxima, smustgrave: Fix cspell use: specify globRoot and always pass --root to cspell

Issue #3075608 by mondrake, Mile23, longwave: Introduce TestRun objects and refactor TestDatabase to be testable

Revert "Issue #3262017 by sleitner, ravi.shankar, smustgrave, xjm, longwave, quietone, Gábor Hojtsy, catch, alexpott: Country list is not correctly sorted when it's localized with accents (e.g. German, Turkish)"

This reverts commit c34b922a.

Issue #3262017 by sleitner, ravi.shankar, smustgrave, xjm, longwave, quietone, Gábor Hojtsy, catch, alexpott: Country list is not correctly sorted when it's localized with accents (e.g. German, Turkish)

Issue #2209063 by bnjmnm, Sam152, tarekdj, lauriii, Wim Leers, LewisNyman, quietone: Fix the flicker of the "active" icons when a high-latency user clicks on toolbar items

Issue #3331818 by xjm, Spokje: commit-code-check.sh gives unclear output when CSS is not properly rebuilt