Issue #2842141 by hchonov: Document that more specific hooks might be called before the primary hook depending on the module names

Issue #2939237 by Anjali Rathod, pooja saraah, apaderno, eojthebrave: Update the description given for $form_id

Issue #2939645 by quietone, hgoto, dhirendra.mishra, jungle, kostyashupenko, govind.maloo, John Cook, alexpott: The sample batch finished callback function should have the fourth parameter

Issue #3152415 by Lal_, rik-dev, Matroskeen, daffie: Bracket-encapsulated field names for static queries in core/lib/Drupal/Core

Issue #2572613 by Malevi4, idebr, pfrenssen, Mile23, RajeevK: Fix 'Drupal.Array.Array.CommaLastItem' coding standard

Issue #2935255 by Jo Fitzgerald, kim.pepper, voleger, alexpott, martin107, jibran, catch: Remove all usages of drupal_get_message and drupal_set_message in core lib

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

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Revert "Issue #2704871 by pepegarciag, ieguskiza, snehi, gaurav.pahuja, rajeshwari10, dimaro, gargsuchi, pashupathi nath gajawada, penyaskito, Manuel Garcia, Mile23: Replace usages of deprecated method drupal render()"

This reverts commit ae3ee317.

Issue #2704871 by pepegarciag, ieguskiza, snehi, gaurav.pahuja, rajeshwari10, dimaro, gargsuchi, pashupathi nath gajawada, penyaskito, Manuel Garcia, Mile23: Replace usages of deprecated method drupal render()

Issue #2729171 by Vinay15, kiamlaluno, jhodgdon: callback_batch_operation() code still contains Drupal 6 code

Issue #2603818 by jhodgdon, beejeebus, blackra: Add defgroups for listing page headers for api.drupal.org

Issue #2545972 by alexpott, joelpittet, ericjenkins, stefan.r, Wim Leers, Cottser: Remove all code usages SafeMarkup::checkPlain() and rely more on Twig autoescaping

Issue #2401843 by lahoosascoots, jhodgdon: Move all *.api.php files except system.api.php out of system module directory

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2289917 by Wim Leers, mdrummond, lauriii, Manuel Garcia, emma.maria, Scionar, davidhernandez: Convert "messages" page element into blocks

Issue #2322509 by prics, cilefen, gaurav.goyal, harijari, Temoor: Replace all instances of node_load(), node_load_multiple(), entity_load('node') and entity_load_multiple('node') with static method calls.

Issue #2089331 by grom358 | thedavidmeister: [meta] Replace calls to check_plain() with Drupal\Component\Utility\String::checkPlain().

Issue #2173655 by Cottser, xjm, jessebeach, alexpott, rlmumford: Refactor theme() to _theme(); make it a private API to discourage module developers from circumventing the renderable build system.