Issue #2012812 by thedavidmeister, pwieck: drupal_render() can't distinguish between empty strings from theme() from an implemented hook and no hook being matched.

Issue #2022087 followup by damiankloip: Add module owner to plugin definition in AnnotatedClassDiscovery.

Issue #1828536 by sun, thedavidmeister, benjf, derek.deraps, jenlampton, dcam, pwieck: Rename 'type' variable of theme_item_list() to 'list_type'.

Issue #1962234 by dawehner, damiankloip, alexpott: Move views_fetch_fields() into an autoloadable class.

Issue #1981314 by pcambra, aspilicious, andypost, swentel: Drop procedural usage of fields in field module.

Issue #1987822 by vijaycs85, jrglasgow, tim.plunkett: Convert system_date_time_lookup() to a new style controller.

Issue #2020361 by vijaycs85: Followup for: Create LanguageConfigContext to activate configuration overrides based on language.

Issue #1858616 by Berdir: Extract generic CacheCollector implementation and interface from CacheArray.

Issue #1984610 by Albert Volkman, dawehner, tim.plunkett: Convert user_pass() to a new-style Form object.

Issue #2020167 by mikeker, dawehner, irinaz, tim.plunkett: Add a name and email search field to the admin/people view.

Issue #2022207 by pcambra, Berdir: Make references to User class in test docs reference UserInterface instead

Issue #2013094 by pwieck, Cottser: Remove unnecessary template_preprocess() reference from all Twig files

Issue #2009664 by esunger, jeroen12345, aaronott, hussainweb: Replace theme() with drupal_render() in rdf module.

Issue #1839468 by ParisLiakos, damiankloip, dawehner, jibran: Replace aggregator rss parsing with Zend Feed.

Issue #1821844 by dawehner, jibran, damiankloip, xjm, ParisLiakos, wamilton, olli: Aggregator views integration.

Issue #2001202 by DmitryDrozdik, ebeyrent: Replace drupal_container() with Drupal::service() in the aggregator module.

Issue #2020361 by vijaycs85: Create LanguageConfigContext to activate configuration overrides based on language.

Issue #1919470 by s_leu, Berdir, Cottser, joelpittet, YesCT, Wim Leers: Add a search field to the test overview page.

Issue #2004350 by Berdir, Dean Reilly: Fixed Unserialised database connection objects don't use Drupal's PDO Statement class.