Issue #2335659 by tim.plunkett, dawehner, effulgentsia, sun: Remove FormState ArrayAccess usage from core.

Issue #1825952 by Fabianx, joelpittet, bdragon, heddn, chx, xjm, pwolanin, mikey_p, ti2m, bfr, dags, cilefen, scor, mgifford: Turn on twig autoescape by default

Issue #2003800 by jhedstrom, filijonka, YesCT, ParisLiakos, steeloctopus, damiankloip, sun, LinL, amateescu: Move drupal_check_memory_limit() and parse_size() functionality to components.

Revert "Issue #1106160 by tim.plunkett, BarisW: Fixed Color module uses the public file system but doesn't check if it is set."

This reverts commit cef318b5.

Issue #2183113 by jhodgdon, effulgentsia, tim.plunkett, herom, larowlan: Update hook_help signature to use route_name instead of path.

Issue #2203407 by nod_, sun: Replace #attached library array values with provider-namespaced strings.

Issue #924322 by tim.plunkett, Devin Carlson, dicix, mike stewart | Jeff Burnz: Color_scheme_form_submit() assumes color.inc provides keys that should be optional.

Issue #1996238 by sun, nod_, damiankloip, Wim Leers, longwave, alexpott, Xano, mdrummond, Mark Carver, Jeff Burnz, highrockmedia, joelpittet, et al: Replace hook_library_info() by *.libraries.yml file.

Issue #2196815 by kirby14: Convert all calls & docs references to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in color module.

Issue #2049167 by jbrown: Fixed Don't use function_exists() on functions that are built into PHP 5.3.

Issue #1106160 by tim.plunkett, BarisW: Fixed Color module uses the public file system but doesn't check if it is set.

Issue #2002650 by mrsinguyen, chertzog, legolasbo, Erik Erskine, rhm50, sandergo90, grisendo, targoo, janstoeckler, maximpodorov, beowulf1416: Improve maintainability by removing unused local variables.

Issue #2003570 by aparnakondala123, vineet.osscube, tstoeckler: Fixed Enabling RTL and then changing theme colors moves the hexadecimal # to the right.

Issue #2010636 by mcjim, Wim Leers, typhonius: Remove drupal_add_css() and drupal_add_js() from color.module — use #attached.

Issue #352951 by Wim Leers, mfer, mcjim, larowlan, RobLoach, sdboyer, Owen Barton, JohnAlbin: Make JS & CSS Preprocessing Pluggable.

Issue #2003814 by dasjo, pmelab, Cottser: Remove Bartik process layer functions, refactor color module alterations.

Issue #1898052 by jenlampton, taslett, Cottser, Pierre Paul Lefebvre, c4rl, joelpittet: Convert color module to Twig.

Issue #1987066 by Kevin Morse, JohnAlbin, rteijeiro, echoz, ry5n: Rename files to match CSS file naming convention.

Issue #1804380 by miro_dietiker, vijaycs85, 8thom, swentel: Convert color variables to config/state.

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

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