Issue #2922570 by Berdir, paulocs, anmolgoyal74, dww, ravi.shankar, tobiasb, catch, plach, longwave, dawehner, joseph.olstad, alexpott, larowlan, Spokje, andypost, aamouri, Wim Leers, Daniel Kulbe, shabana.navas, klasseng, dschenk, ducktape, marcoliver, anevins, SaschaHannes, pankaj.singh, rpsu, tanubansal, Dom.: The node view page triggers a lot of expensive access checks for relationship links

Revert "Issue #2454915 by SaschaHannes, anevins, Spokje, ducktape, joseph.olstad, marcoliver, dschenk, Dom., larowlan, isholgueras: Entity link annotations in HTML head are not valid HTML"

This reverts commit 9d4138cb.

Issue #2454915 by SaschaHannes, anevins, Spokje, ducktape, joseph.olstad, marcoliver, dschenk, Dom., larowlan, isholgueras: Entity link annotations in HTML head are not valid HTML

Issue #2851394 by GoZ, hgunicamp, oknate, jungle, wolffereast, tameeshb, mmatsoo, ridhimaabrol24, jofitz, swarad07, tanc, shaktik, dimaro, shashikant_chauhan, MerryHamster, quietone, nitesh624, martin_q, boaloysius, gaurav.kapoor, nitvirus, ankithashetty, Munavijayalakshmi, kostyashupenko, leolando.tan, amit.drupal, ravi.shankar, akashkrishnan01, Swapnil_Kotwal, Saviktor, mrinalini9, anmolgoyal74, Venkatesh Rajan.J, shimpy, lomasr, Dinesh18, shubham.prakash, mahtab_alam, markdorison, cilefen, longwave, bleen, xjm, alexpott, gmaltoni: Fix grammar 'a' to 'an' when necessary

Issue #2691675 by Berdir, Mile23, alexpott: Replace deprecated entityManager() in ControllerBase descendents

Issue #3003713 by Wim Leers, alexpott, zann1e, idebr: Use absolute URLs in link relations Google doesn't support relative URLs

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 #2406533 by alexpott, willzyx, olli, Berdir, DamienMcKenna, Dom., Crell, Wim Leers, mdrummond, mirzu, enjoyiacm, catch: edit-form, delete-form etc. <link> tags added on /node/{node} are invalid according to W3C Validator

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

Issue #2513332 by stevector: NodeViewController::view() does not pass along its arguments when calling parent method

Issue #2505989 by alexpott, dawehner, olli: Controllers render caching at the top level and setting a custom page title lose the title on render cache hits

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

Issue #2350877 by dawehner, Wim Leers, hussainweb: Deprecate/rename drupal_add_feed(), drupal_add_html_head(), drupal_add_html_head_link(), drupal_add_http_header(), and allow to be set declaratively in #attached.

Issue #2216437 by Wim Leers: Entity labels are not in-place editable on 'full entity page' (prime example: node title).