Issue #2512456 by tim.plunkett, legolasbo, MattA, dawehner, googletorp, darol100, Bojhan, webchick, andypost, ivanstegic, larowlan, lauriii, LewisNyman, tkoleary, rickvug, eliza411, lunk_rat, nickrosencrans, stpaultim, Mark LaCroix: Implement the new block layout design to emphasize the primary interaction of placing a block

Issue #2491155 by mikeburrelljr, Mac_Weber, opdavies: Update drupal.org and kernel.org URLs in core modules (Follow-up to 2489912)

Issue #2473105 by ifrik, jhodgdon, lostkangaroo, opratr, LinL: Update hook_help texts that link to modules that can be uninstalled

Issue #2273923 by mpdonadio, pfrenssen, effulgentsia, pcambra, xjm, tim.plunkett, martin107, cilefen: Remove html => TRUE option from l() and link generator

Issue #2407361 by cilefen, JeroenT, hussainweb, neclimdul, ircmaxell, tim.plunkett, nlisgo, Crell: Move usages of drupal_html_id() to Html::getUniqueId()

Revert "Issue #2407361 by JeroenT, cilefen, hussainweb: Move usages of drupal_html_id() to Html::getUniqueId()"

This reverts commit 85b8c837.

Issue #2407361 by JeroenT, cilefen, hussainweb: Move usages of drupal_html_id() to Html::getUniqueId()

Issue #2151469 by rpayanm, lokapujya, JeroenT, alansaviolobo, Richard Damon, pflame, ianthomas_uk: Clean-up usage of deprecated list_themes() and _system_rebuild_theme_data() in favor of theme_handler service.

Issue #2030571 by calebtr, daffie, filijonka, YesCT, Thomas Brekelmans, alexpott, Mile23, tadityar, Sharique, tim.plunkett, boztek: Expand Block with methods

Revert "Issue #2273923 by mpdonadio, pfrenssen, dawehner, xjm, cilefen: Remove html => TRUE option from l() and link generator"

This reverts commit 0bcabf50.

Issue #2273923 by mpdonadio, pfrenssen, dawehner, xjm, cilefen: Remove html => TRUE option from l() and link generator

Issue #2318755 by LinL, Devin Carlson, effulgentsia, catch: Block Module: Fix documentation that refers to enabling/disabling of modules

Issue #2339151 by EclipseGc, tim.plunkett, Gábor Hojtsy, effulgentsia: Conditions / context system does not allow for multiple configurable contexts, eg. language types

Issue #2363025 by Wim Leers, dawehner, larowlan: Push usage of drupal_set_page_content() higher: out of blocks and page display variants.

Issue #2316561 by jmolivas | YesCT: Type hint hooks with interface: ConfigurableLanguageInterface instead of LanguageEntity/ConfigurableLanguage.

Issue #2350949 by Wim Leers: Add hook_page_attachments(_alter)() and deprecate hook_page_build/alter().

Issue #2234331 by mortendk, lauriii, LewisNyman, sqndr, rteijeiro, G-raph, amitgoyal: Fixed Change the body classes to follow Drupal 8 CSS standards.

Issue #2246675 by rpayanm, johnstorey, holly.ross.drupal | mgbellaire: Remove all unnecessary 'template' lines in hook_theme() declarations.

Issue #2347465 by tim.plunkett, dawehner, cilefen: Convert all instances of #type link/links to convert to use routes.

Issue #2277103 by tim.plunkett, pwolanin, Wim Leers, dawehner, hotpizzas: Switch Drupal::l() and LinkGenerator to expect a Url object.

Issue #2343651 by xjm, tim.plunkett, Wim Leers, dinarcon, dawehner: Remove most remaining l() calls.

Issue #2328411 by dawehner, geerlingguy, herom: Convert all permissions to yml files and permission callbacks.

Issue #2328913 by lanchez, lauriii, joelpittet | crowdcg: Move block classes out of preprocess and into templates.

Issue #2321593 by Temoor: Replace all instances of block_load(), entity_load('block') and entity_load_multiple('block') with static method calls.

Issue #2271005 by martin107, YesCT, alimac, mrjmd: Rename Language module's LanguageInterface to ConfigurableLanguageInterface and Language to ConfigurableLanguage.

Issue #2216535 by jhodgdon, Berdir: Replace Node overview topic and Node API topic with Entity Hooks topic.

Issue #2238217 by effulgentsia, neclimdul, martin107, tim.plunkett, cweagans, kim.pepper, xjm: Introduce a RouteMatch class.

Issue #1989568 by Berdir: Remove block config ID from being used as an HTML ID or template suggestion.