Issue #540008 by kristiaanvandeneynde, Spokje, daffie, clayfreeman, alexpott, eelkeblok, michaelfavia, ianthomas_uk, zaporylie, johnwebdev, abhisekmazumdar, anmolgoyal74, greggles, quietone, shaal, catch, rivimey, AaronMcHale, Berdir, ndf, xjm, finne, Wim Leers, esolitos, heddn, webchick, Bojhan, andypost, efpapado, benjifisher, lauriii, Gábor Hojtsy, moshe weitzman, harings_rob: Add a container parameter that can remove the special behavior of UID#1

Issue #3421013 by mohit_aghera, sorlov, smustgrave, mstrelan, larowlan, catch: Convert Search plugin discovery to attributes

Issue #2926070 by smustgrave, dimitriskr, andypost, gnuget, zahord, yogeshmpawar, MerryHamster, kim.pepper, alexpott, Mile23, daffie, larowlan: Deprecate ModuleHandlerInterface::getName()

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

Issue #3420993 by Amber Himes Matz, andypost, sakthi_dev, smustgrave, larowlan, catch, quietone: Convert HelpSection plugin discovery to attributes

Issue #3404108 by quietone, smustgrave: Fix test performance of \Drupal\Tests\help\Functional\HelpTest

Issue #3379495 by quietone, xjm, smustgrave: Convert enable/disable to install/uninstall in hook_help()

Issue #3252386 by alexpott, longwave, duadua, mondrake, mstrelan, andypost, Spokje, VladimirAus, catch, effulgentsia, Berdir, xjm, bircher, joachim, larowlan: Use PHP attributes instead of doctrine annotations

Issue #3386458 by catch, quietone, alexpott, larowlan: Add GenericModuleTestBase and use it to test general module things

Issue #3377604 by Amber Himes Matz, andypost, smustgrave: Remove leftover mentions of help_topics namespace in help module

Issue #3121340 by Amber Himes Matz, andypost, jhodgdon, quietone, xjm: Fix up minor copy problems in help topics

Issue #3025577 by andypost, Abhisheksingh27, jhodgdon, alexpott, quietone, smustgrave: Move help topics to core or the correct modules

Issue #3376376 by Charlie ChX Negyesi, andypost: HelpSectionManager::clearCachedDefinitions breaks the update system

This reverts commit e482afdd.

Issue #3038971 by claudiu.cristea, kim.pepper, andypost, Berdir, daffie: Move system_get_module_admin_tasks() into a service and deprecate it

Issue #3335768 by Berdir, andypost, smustgrave, catch: Manually clear cache keys from plugin managers with finite variations instead of using cache tags

Issue #3358340 by andypost, Amber Himes Matz: Update help.help_topic_search to remove mention of Help Topics module