Issue #2923015 by cburschka, amateescu, tstoeckler, alexpott, hchonov, mondrake, pfrenssen: [PHP 7.2] Incompatible method declarations

Issue #2873696 by nvexler, wengerk, gido, Jo Fitzgerald, xjm: Add @internal to core classes, methods, properties to Form Classes

Issue #1848686 by Johnny vd Laar, Berdir, JeroenT, geertvd, mogtofu33, hauruck, Manuel Garcia, pfrenssen, Bambell, realityloop, ParisLiakos, webflo, cyborg_572, Algeron, zniki.ru, xjm, Wim Leers, dawehner, yoroy: Add a dedicated permission to access the term overview page (without 'administer taxonomy' permission)

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

Issue #2572633 by vprocessor, andypost, attiks, andriyun: Fix 'Drupal.Commenting.ClassComment' coding standard

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

Issue #2570355 by Sutharsan, stefan.r, kgoel, josephdpurcell, joelpittet, justAChris, dawehner, pfrenssen, pwolanin, David_Rothstein, catch: Replace remaining !placeholder and @placeholder with :placeholder for URLs

Issue #2453175 by tim.plunkett, plach, rteijeiro, effulgentsia, eshta, dawehner, fago, Berdir, alexpott: Remove EntityFormInterface::validate() and stop using button-level validation by default in entity forms

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

Issue #1976298 by larowlan: Move taxonomy_get_tree() and associated functions to Taxonomy storage, deprecate procedural wrappers.

Issue #2309323 by Berdir, tim.plunkett: Allow #submit and #validate to be specified as methods of the form object.

Issue #2066535 by tim.plunkett, jsst, Berdir: Add EntityManagerInterface and stop typehinting with EntityManager.

This reverts commit e18109e2.

Seems to be causing testbot failures. Rolling back for now.