Issue #1778122 follow-up by beejeebus: Added missing = sign.
Issue #2089671 by disasm, tim.plunkett: Convert non-test form callbacks to new form controller.
Issue #2045685 by amontero: Fixed Broken 'Visit your new site' link at install process finish page if web path contains '/core'.
Issue #2053489 followup by tim.plunkett, klausi: Standardize on \Drupal throughout core.
Issue #2063461 by damiankloip, oadaeh, dawehner: Fixed Automatically fetch the count of items, if there is @total part of the result area.
Issue #2078917 by sun: Fixed E-mails contain double spaces in soft-wrapped sentences.
Issue #2083983 by damiankloip: Unit test Drupal\serialization\Encoder\XmlEncoder class.
Issue #2041225 by swentel: Fixed FieldInstance::delete() doesn't clean up all form modes.
Issue #1823454 by jhodgdon: Verify transliteration data sources and their quality, and potentially eliminate maintenance.
Issue #2083615 followup by Gábor Hojtsy: Use links annotation for config entity URI like for content entities.
Issue #2039677 by lokapujya: Fixed 'provider' keys for comment wizard default filter definitions.