Issue #2511308 by dimitriskr, ankithashetty, smustgrave, quietone, Wim Leers: Rename RendererInterface::renderPlain() to ::renderInIsolation()

Revert "Issue #3306554 by andypost, mondrake: InvocationMocker::withConsecutive() is deprecated in PHPUnit 9.6 and removed from PHPUnit 10 - easy replacements"

This reverts commit 24009901.

Issue #3306554 by andypost, mondrake: InvocationMocker::withConsecutive() is deprecated in PHPUnit 9.6 and removed from PHPUnit 10 - easy replacements

Issue #3217717 by longwave, mondrake, tim.plunkett, xjm: Replace usages of the at() matcher, which is deprecated

Issue #3107732 by mondrake, longwave, swatichouhan012, salah1, xjm, catch, alexpott, Berdir: Between April 13 and April 17, 2020: Add return typehints to setUp/tearDown methods in concrete test classes

Issue #3073318 by Spokje, Mile23, mondrake: Remove usages of \PHPUnit_Framework_MockObject_MockObject

Issue #2920571 by dev.patrick, Lendude, Xtal, chanderbhushan: Inline form errors Deprecated link function

Issue #2935256 by Jo Fitzgerald, voleger, kim.pepper, ibustos, Yogesh Pawar, catch, jibran: Remove all usages of drupal_get_message and drupal_set_message in modules

Issue #2856950 by dmsmidt, marcvangend, tim.plunkett, andrewmacpherson, Lendude, tameeshb, Berdir, xjm, tedbow, Gábor Hojtsy, Sutharsan: Add a possibility to disable inline form errors for a complete form

Issue #2828092 by dmsmidt, gaurav.kapoor, s.d.sirois, andrewmacpherson, Gábor Hojtsy, tstoeckler, jules., Wim Leers, SKAUGHT, marcvangend, yoroy, catch: Inline Form Errors not compatible with Quick Edit

Issue #2754977 by dmsmidt, marcvangend, mohit_aghera, Getekid, tim.plunkett, ndf: Enhance formErrorHandler to include children errors on RenderElements

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

Issue #2578561 by tim.plunkett, joelpittet, Bojhan, Fabianx, xjm, cilefen, David_Rothstein, DamienMcKenna: Move "Inline Form Errors" functionality to optional module and restore D7-style form errors by default

Issue #2550981 by alexpott, stefan.r, davidhernandez, joelpittet, Wim Leers, xjm, josephdpurcell, akalata, dawehner: Remove SafeMarkup::set in FormErrorHandler::displayErrorMessages()

Issue #1493324 by tim.plunkett, dmsmidt, mgifford, bleen18, davidhernandez, crasx, mparker17, stefan.r, YesCT, joelpittet, tstoeckler, larowlan, vijaycs85, swentel, rpayanm, Bojhan, LewisNyman, emma.maria, BarisW, njbarrett, rteijeiro, nod_, sun, joshtaylor, mrjmd, webchick, marcvangend, kattekrab, SKAUGHT, bowersox, andrewmacpherson, Manjit.Singh, RavindraSingh, Wim Leers, BLadwin, aspilicious, mortendk, mausolos, jessebeach, Gábor Hojtsy, anandps, falcon03, franz, andypost, rooby, rootwork, Cottser, Xano: Inline form errors for accessibility and UX