Issue #1852104 by sun, nod_, Cottser, swentel: #type details: Remove #collapsible property.
Issue #916388 by disasm, podarok, dawehner, andypost, amateescu, Dave Reid: Convert menu links into entities.
Issue #1864066 by sun, andypost, tim.plunkett: Simplify hook_menu_local_tasks() and MENU_DEFAULT_LOCAL_TASK usage.
Issue #1912302 by vijaycs85: Create configuration schemas for book module.
Issue #1784806 by beltofte: Standardize capitalization on actions in book: 'edit order and titles'.
Issue #1928082 by vijaycs85, YesCT, alexpott: Fixed Make usage of book.settings:allowed_types() consistent.
Issue #1591806 by tim.plunkett, ryanissamson, jenlampton, Risse, psynaptic, Gábor Hojtsy, kmcculloch, pakmanlh, Rob Loach: Change block 'subject' so that it's called (admin_)label like everything else on the theme layer.
Issue #1849752 by effulgentsia, Berdir, jibran, neclimdul: Abstract non-Drupal-specific parts of AnnotatedClassDiscovery into a Drupal\Component base class.
Issue #1793074 by cweagans, sun, chx: Convert .info files to YAML.
Issue #1933190 by larowlan: Fixed Fatal error when reordering book pages in book admin.
Issue #1845402 by Crell, amateescu, dawehner, klausi, g.oechsler: Change notice: Update menu link access checks for new router.
Issue #1925196 by tim.plunkett, joergM, robmc: Convert book's system_config_form() to SystemConfigFormBase.
Issue #1818556 by das-peter, plach, fago, Berdir, vijaycs85: Change notice: Convert nodes to the new Entity Field API.
Issue #1933548 by alexpott: Fixed Book allowed_types() settings repetitive and in under certain conditions can change unexpectedly.
Issue #1969276 by effulgentsia, tim.plunkett, EclipseGc: Refactor block plugins to make room for a BlockBase::build() implementation.
Issue #1938296 by disasm, YesCT: Convert book_admin_overview() and book_render() to a new-style Controller.
Issue #1913618 by tim.plunkett, amateescu: Convert EntityFormControllerInterface to extend FormInterface.
Issue #501472 by izus, kiamlaluno, valthebald, catch: Move book administration to admin/structure.
Issue #501472 follow-up by David_Rothstein: Move book administration to admin/structure.
Issue #1929288 by ParisLiakos, Dave Reid: Move cryptographic functions to Crypt component.