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

Issue #2552799 by heddn, glenshewchuck, Xano, deepakaryan1988, swentel, jordanpagewhite, yched, tim.plunkett: FieldType with no available widget causes Fatal error

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

Issue #2226493 by Berdir, Wim Leers, m1r1k, mr.baileys, andypost, scor, cbr, joelpittet: Apply formatters and widgets to Node base fields.

Issue #2145103 by Berdir, das-peter, fago, amateescu: Provide non-configurable field types for entity created, changed and timestamp fields.