Issue #2866816 by harsha012, BrightBold, cwells, joelpittet, idebr: Update stylelint rule length-zero-no-unit to be consistent with Drupal's CSS standards

Issue #2377747 by mondrake, eiriksm, rpayanm, adci_contributor, mgifford, oakulm, Truptti, chetan2111, joyceg, alexpott, xjm, yoroy, catch: Incorrect node create validation error when an invalid image is attached to a field

Issue #2928249 by alexpott, mondrake: Introduce a PHPUnit 6+ compatibility layer for Drupal\Tests\Listeners classes

Issue #2670966 by xjm, Crell, claudiu.cristea, alexpott, timmillwood, rakesh.gectcr, catch, dawehner, David_Rothstein, hchonov, martin107, tstoeckler, andypost, cilefen, RobLoach, Fabianx, salvis, hussainweb, JeroenT, larowlan, pfrenssen, daffie, webchick, wturrell: Warn users of old PHP versions

Issue #2922371 by Mile23, dawehner, caseylau: Numerous deprecation messages for test traits do not reference the correct replacement

Issue #2572795 by mfernea, zaporylie, pfrenssen, andypost, attiks, alexpott, xjm, Mile23, catch, borisson_: Fix coding standard for closures - Drupal.WhiteSpace.ScopeClosingBrace and Generic.Functions.OpeningFunctionBraceKernighanRitchie

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

Revert "Issue #2572795 by mfernea, pfrenssen, attiks, andypost, alexpott, xjm, Mile23, catch, borisson_: Fix coding standard for closures - Drupal.WhiteSpace.ScopeClosingBrace and Generic.Functions.OpeningFunctionBraceKernighanRitchie"

This reverts commit c422bdfa.

Issue #2572795 by mfernea, pfrenssen, attiks, andypost, alexpott, xjm, Mile23, catch, borisson_: Fix coding standard for closures - Drupal.WhiteSpace.ScopeClosingBrace and Generic.Functions.OpeningFunctionBraceKernighanRitchie

Issue #2921931 by dravenk: \Drupal\simpletest\UserCreationTrait  @deprecated references new class in the incorrect namespace

Issue #2921942 by caseylau: \Drupal\simpletest\ContentTypeCreationTrait @deprecated references new class in the incorrect namespace

Issue #2921860 by laughnan, tedbow: \Drupal\simpletest\NodeCreationTrait @deprecated references new class in the incorrect namespace

Issue #2870194 by alexpott, Mile23, jibran, larowlan, tim.plunkett: Ensure that process-isolated tests can use Symfony's PHPunit bridge to catch usages of deprecated code

Issue #2917883 by quietone, TR, Jo Fitzgerald, masipila, phenaproxima: Rename 'migration_templates' directories in core modules to 'migrations'

Issue #2572787 by alexpott, mfernea, attiks, andriyun, andypost, RoSk0, hussainweb, klausi, martin107: Fix 'Drupal.WhiteSpace.CloseBracketSpacing' coding standard

Issue #2873696 by nvexler, wengerk, gido, Jo Fitzgerald, xjm: Add @internal to core classes, methods, properties to Form Classes

Issue #2898373 by Mile23, Jo Fitzgerald, joachim, dawehner, Gábor Hojtsy, Lendude: Gaps in docs for KernelTestBase

Issue #2449143 by damiankloip, tedbow, Wim Leers, dawehner, Pavan B S, Tybor, effulgentsia, larowlan: REST views specify HTML as a possible request format, so if there is a "regular" HTML view on the same path, it will serve JSON

Issue #2572699 by rajeshwari10, andriyun, mfernea, pashupathi nath gajawada, marvin_B8, attiks, andypost, alexpott: Fix 'Drupal.ControlStructures.InlineControlStructure' coding standard

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

Issue #2728579 by Mile23, neclimdul, Munavijayalakshmi, klausi, dawehner: Explicitly skip @requires module in PHPUnit Kernel and Browser tests

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

Issue #2759789 by mfernea, Mile23, andriyun, dawehner, klausi: Fix 'Drupal.Semantics.FunctionAlias' coding standard

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

Issue #2722699 by anoopjohn, mfernea, Mile23, martin107: Fix Drupal.Commenting.FunctionComment.InvalidReturnNotVoid

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

Issue #2803621 by Mile23: Break BrowserTestBase & children dependency on Simpletest, deprecate stub BC traits

Issue #2903331 by mfernea: Fix 'Drupal.NamingConventions.ValidVariableName.LowerStart' coding standard

Issue #2569805 by quietone, Jo Fitzgerald, mikeryan, joelpittet, heddn, Adita, Miguel.kode, iMiksu, tvb, maxocub, juancasantito, phenaproxima, alexpott, neclimdul, xjm: For Drupal migration, identify the source module

Issue #2893371 by Mile23: Several methods theoretically added to TestInfoParsingTest were actually not

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 #2881012 by Lendude, dawehner, michielnugter: Move generatePermutations out of testbase into a trait