Issue #2572307 by vprocessor, attiks, andriyun, alexpott, pfrenssen: Fix 'Generic.PHP.UpperCaseConstant' coding standard

Issue #2697909 by pguillard, himanshugautam, snehi, aburrows, jhodgdon: Fix "login (noun/adjective)" vs. "log in (verb)" in comments (and logout/log out)

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

Issue #2686765 by sidharthap, thhafner: cacheUntilEntityChanges() is deprecated and should be replaced with addCacheableDependency()

Issue #2625696 by chx, benjy, alexpott, catch, mikeryan, andypost, phenaproxima: Make migrations themselves plugins instead of config entities

Revert "Issue #2625696 by chx, alexpott, benjy, mikeryan, andypost, phenaproxima: Make migrations themselves plugins instead of config entities"

This reverts commit 694994fe.

Issue #2625696 by chx, alexpott, benjy, mikeryan, andypost, phenaproxima: Make migrations themselves plugins instead of config entities

Issue #2641584 by Mac_Weber, heykarthikwithu, legovaer: Replace deprecated usage of  entity_create('field_config') with a direct call to FieldConfig::create()

Issue #2641520 by Mac_Weber, rakesh.gectcr, darkdim: Replace deprecated usage of  entity_create('contact_form') with a direct call to ContactForm::create()

Issue #2641586 by Mac_Weber, marvin_B8: Replace deprecated usage of  entity_create('field_storage_config') with a direct call to  FieldStorageConfig::create()

Issue #2662990 by alexpott: Flood's database backend is a core service but it depends on system install

Issue #2501909 by pguillard, pjbaert, shwetaneelsharma, jhodgdon, ifrik: Update the UI texts for the Contact module

(cherry picked from commit e0516e39)

Issue #2600666 by tim.plunkett: Route definitions using entity type paramconverters with serial IDs should add an integer requirement

Issue #2072945 by Berdir, plach, effulgentsia, Schnitzel, andypost, Wim Leers: Remove the $langcode parameter in EntityAccessControllerInterface::access() and friends

Issue #2073217 by andypost, Berdir, plach: Remove the $langcode parameter from the entity view/render system

Issue #2560049 by hass, chrisfree, cilefen, Wim Leers, Gábor Hojtsy: Incorrect capitalisation of translatable strings

Issue #2464427 by jibran, Wim Leers, Berdir, borisson_: Replace CacheablePluginInterface with CacheableDependencyInterface

Issue #2576533 by alexpott, stefan.r, Wim Leers, dawehner, xjm, effulgentsia, catch: Rename SafeStringInterface to MarkupInterface and move related classes

Issue #2476947 by mdrummond, Wim Leers, davidhernandez, lauriii, joelpittet, andypost, Cottser, JeroenT, Manuel Garcia, rpayanm: Convert "title" page element into a block

Issue #2575599 by jaredsmith, joshi.rohit100, dawehner, xjm, alexpott, plach, Berdir, Sutharsan, borisson_, justAChris, stefan.r, joelpittet, Ryan Weal: Remove !placeholder in ContactPersonalTest and Drupal\migrate\Plugin\migrate\id_map\Sql

Issue #2551453 by LoMo, Ayesh, jaxxed, LinL, madhavvyas, Miraya: Follow-up: Consistently use "email" instead of "e-mail" in Drupal

Issue #2112679 by Berdir, damiankloip, nlisgo, krlucas, lokapujya, m1r1k, piyuesh23, blueminds, stefan.r, subhojit777, dawehner, kerby70, Dustin LeBlanc, znerol, JeroenT, borisson_, scor, amitgoyal, s_leu: getUsername() should return the username getDisplayName() for the formatted user name

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 #2560783 by stefan.r, joelpittet, lauriii, Cottser, Sutharsan, kgoel, justAChris, Gábor Hojtsy, dawehner, jhodgdon, effulgentsia, xjm, andypost, googletorp: Replace !placeholder with :placeholder for URLs in hook_help() implementations

Issue #2506445 by joelpittet, Ryan Weal, Sutharsan, alexpott, subhojit777, justAChris, nlisgo, effulgentsia, rpayanm, larowlan, chx, xjm, dawehner, geertvd, lauriii, izus, andypost, borisson_, Sharique: Replace !placeholder with @placeholder in t() and format_string() for non-URLs in tests

Issue #2560641 by alexpott, lauriii, Xano, borisson_, ianthomas_uk, olli: Remove all usages SafeMarkup::checkPlain() from render arrays