Issue #2784951 by Shashwat Purav, er.pushpinderrana: Comment contains a reference to a function that doesn't exist anymore

Issue #2807871 by phenaproxima, svendecabooter: Convert Book's Migrate source tests to new base class

Issue #2807855 by phenaproxima, maijs, svendecabooter: Convert Block's Migrate source tests to new base class

Issue #2807509 by phenaproxima, quietone: Convert Aggregator's Migrate source tests to new base class

Issue #2807905 by svendecabooter: Convert Menu_link_content's Migrate source tests to new base class

Issue #2811133 by cilefen, Wim Leers, neclimdul, dawehner: Confusing error response set by ContentTypeHeaderMatcher when forgetting the Content-Type request header

Issue #2817565 by Sam152: Bugs in ModerationStateFieldItemList mean it can never be used with a field formatter

Issue #2753741 by Wim Leers, dawehner, znerol: Page Cache caches all safe HTTP methods (GET+HEAD), but generates the same cache ID for either: add test coverage to prove this is correct

Issue #2527324 by Kartagis, naveenvalecha: The install message referencing insufficient PDO drivers links to the wrong documentation page

Issue #2603236 by dbazuin, Pepino710, lomasr, tomgilissen, criscom, alimac, yoroy, Sutharsan, ifrik, BarisW, YesCT, xjm: Improvement help text Recipient field

Revert "Issue #2811133 by Wim Leers, neclimdul, dawehner: Confusing error response set by ContentTypeHeaderMatcher when forgetting the Content-Type request header"

This reverts commit 97f0d43d.

Issue #2811133 by Wim Leers, neclimdul, dawehner: Confusing error response set by ContentTypeHeaderMatcher when forgetting the Content-Type request header

Issue #2795395 by Yogesh Pawar, tresti88, marvin_B8, shashikant_chauhan, tstoeckler, dawehner: PathRootsSubscriber breaks if there are no routes

Issue #2409453 by quietone, phenaproxima, hussainweb, vprocessor, hosef, chx: Variable to config: statistics.settings [d7]

Issue #2717207 by mpdonadio, dawehner, catch, alexpott: Add a time service to provide consistent interaction with time()/microtime() and superglobals

Issue #2801899 by shashikant_chauhan, daffie, axel.rutz: Rename Drupal\Core\Database\Connection::rollback() to Drupal\Core\Database\Connection::rollBack()

Issue #2702969 by andrewmacpherson: Module filter does not announce number of results for screenreader when Toolbar module is disabled

Issue #2702891 by sjsneve: Internet Explorer adds excessive padding to body when toolbar present and page resized after scroll

Issue #2795539 by Shashwat Purav, shashikant_chauhan: Punctuation issue for Place block module in hook_help

Issue #2809115 by petiar, Yogesh Pawar, maxocub: When migrating a multilingual D6 site, the overview page says that the translation upgrade path is missing