Issue #3431452 by godotislate, smustgrave, alexpott: Rename RenderElement and FormElement plugin abstract classes to RenderElementBase and FormElementBase

Issue #3421439 by godotislate, sorlov, quietone, smustgrave, alexpott, larowlan, longwave, andypost: Convert form and render element plugin discovery to attributes

Issue #2619482 by cburschka, ankit.singh, ravi.shankar, jungle, daffie: Convert all get_called_class()/get_class() to static::

Issue #2851204 by swarad07, fotuzlab, Sahana _N, prash_98, anoopjohn, ravi.shankar, jungle, rahul.gore, cilefen, xjm, alexpott, jericho711: #size for Select field documentation is wrong

Issue #3065903 by jhodgdon, benjifisher, larowlan, alexpott: Add label sort ability to Select element

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 #2721725 by Vinay15, snehi, zerbash, er.pushpinderrana, jhodgdon, xjm, Ashish.Dalvi, joachim, Kevin Davison, ckrina: Select form element has undocumented properties

Issue #2709411 by dagmar, jhodgdon: t() is used in an inconsistent way on Drupal\Core\Render\Element documentation

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

Issue #2428399 by SkidNCrashwell, Sagar Ramgade: Default empty option label text different in documentation

Issue #2334405 by almaudoh, drunken monkey: Clean up documentation links to functions moved to render element classes