Issue #1908194 by  richard.c.allen2386: Document what happens in drupal_get_path if the file is not found

Issue #1894382 by nick_schuch: Fixed Update system_update_8004 and taxonomy_update_8001 documentation typo 'indeces' to 'indices'.

Issue #1331486 by katbailey, chx, sun, beejeebus, amateescu: Move module_invoke_*() and friends to an Extensions class.

Revert "Issue #1331486 by katbailey, chx, sun, beejeebus, amateescu: Move module_invoke_*() and friends to an Extensions class. Broke core tests after commit."

This reverts commit c80c3e18.

Issue #736172 by fizk: Fixed drupal_goto() should allow absolute destinations that are within the same site.

Issue #1331486 by katbailey, chx, sun, beejeebus, amateescu: Move module_invoke_*() and friends to an Extensions class.

Issue #1875632 follow-up by nod_, Wim Leers, effulgentsia: Added wrapper function for JS settings merging behavior, fix tabledrag.

Issue #1833516 by Berdir, chx, catch, webchick: Add $settings for low-level configuration - move things out of .

Issue #1875632 by Wim Leers: Fixed Change Drupal JS settings merging behavior: preserve integer keys (allow for array literals in drupalSettings)

Issue #1864944 by Wim Leers: Fixed ajaxPageState does not contain JS files that are in scopes other than 'header'

Issue #575298 by sun, tim.plunkett, Rob Loach, KrisBulman, Jacine, danillonunes: Provide non-PHP way to reliably override CSS.

Issue #1705920 by tim.plunkett, sun, underq, javier.alejandr...: Convert all calls to procedural drupal_array_()*() functions to Drupal\Component\Utility\NestedArray.

Issue #1029460 by sun: Find a better hook than hook_init() for drupal_add_js() and drupal_add_css().

Issue #1787876 by Albert Volkman, cirage, BrockBoland: Add return docs for drupal_get_token() function

Issue #1824778 by vijaycs85, ACF, pcambra, cam8001: Covert css_gzip_compression() and js_gzip_compression() variables to CMI system.

Issue #1571632 by cosmicdreams, marcingy, justafish, chx, KarenS, aspilicious, disasm, swentel, dawehner, rvilar: Convert regional settings to configuration system.

Issue #1168246 by sun, mgifford, Manuel Garcia, mbrett5062, ry5n, Everett Zufelt, nod_, aspilicious, deviantintegral, tim.plunkett: Freedom For Fieldsets! Long Live The DETAILS.

Issue #1269742 by katbailey, beejeebus, pwolanin, g.oechsler, ksenzee: Make path lookup code into an pluggable class.

Issue #891112 by Berdir, sun, Amitaibu, siharris, Cottser: Replace theme_item_list()'s 'data' items with render elements.

Issue #1739986 by pwolanin, moshe weitzman: Fixed fallback in drupal_get_hash_salt(), move it to bootstrap.inc, use instead of $GLOBALS['drupal_hash_salt()'].

Issue #1790920 by alexpott, japicoder, LinL, heyrocker: Move cron_last(), node_cron_last() and common_test_cron() to state system.

Issue #1808200 by sun: Fixed Unit test performance significantly decreased since system list config conversion.

Issue #1696786 by Fabianx, jenlampton, stevector, steveoliver, jwilson3, amateescu, chx: Integrate Twig into core: Implementation issue.

Issue #1664602 by quicksketch, Wim Leers, sun, webchick, nrussell: Fixed drupal_add_js() defer and async options break when aggregation is enabled (Replace with universal attributes array).