Issue #2719695 by alexpott, Mile23: Fix 'Drupal.Classes.ClassDeclaration.CloseBraceAfterBody' coding standard

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

Issue #2571845 by drupal.ninja03, hussainweb, anil280988, snehi, jhodgdon, GoZ, stefan.r: Links to wikipedia/php.net should be part of the actual t() string so they can be localized

Issue #2531678 by mondrake, MattA: The 'create_new' and 'rotate' image operations do not release memory

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 #2531570 by mondrake, MattA, claudiu.cristea: Image objects should release memory when losing scope

Issue #2392559 by mondrake, mitrpaka, JeroenT, rpayanm, adci_contributor, ianthomas_uk: Remove all uses of file_stream_wrapper_get_* and file_get_stream_wrappers

Issue #2392319 by alexpott, effulgentsia: Config objects (but not config entities) should by default be immutable

Issue #2063373 by mondrake, claudiu.cristea, larowlan, arunvs: Fixed Cannot save image created from scratch.

Issue #2028109 by tim.plunkett, almaudoh, twistor, larowlan, slashrsm, Berdir, Arla, neclimdul, Cottser: Convert hook_stream_wrappers() to tagged services.

Issue #2330899 by attiks, Jelle_S, fietserwin: Allow image effects to change the MIME type + extension, add a convert image effect.

Issue #375062 followup by David_Rothstein: Fixed [follow-up] imagecolorsforindex() Color index nnn out of range in GDToolkit.

Issue #2096703 by mondrake, tim.plunkett | tstoeckler: Image toolkits should use PluginFormInterface and ContainerFactoryPluginInterface.

Issue #2211227 by mondrake, xjm | fietserwin: Refactor image and imagetoolkit: isExisting, isSupported, supportedTypes, getMimeType.

Issue #375062 by cs_shadow, juampy, theunraveler, mondrake, hswong3i, smk-ka: Imagecolorsforindex() Color index nnn out of range in GDToolkit.

Issue #2217783 by mondrake: Remove $extension and $mimeType from Image, use image_type_to_xxx function in the getters instead.

Issue #2103621 by mondrake | fietserwin: Move GD logic from ImageInterface to toolkit, tie toolkit instance to Image instance, toolkits should no longer be instantiated separately.

Issue #2048827 by claudiu.cristea, tim.plunkett: Move Image toolkit API from system.module to Drupal\Core.

Issue #2087231 by tim.plunkett, pwolanin: Add a PluginBase in the Core namespace with t() as a helper method.

Issue #1987298 by tim.plunkett, quicksketch: Shorten directory structure and PSR-0 namespacing for plugins.

Issue #1664844 by alexpott, cweagans, heyrocker, eojthebrave, ACF, Berdir: Convert image toolkits into plugins.