Issue #2572637 by ifrik, dubois, ndobromirov, jhodgdon, Gábor Hojtsy, lachezar.valchev, xjm: Update the hook_help for the Interface translation module again

Issue #2578991 by ifrik, jhodgdon, Bojhan, snehi: Update link descriptions on the Configuration page that are confusing

Issue #2576533 by alexpott, stefan.r, Wim Leers, dawehner, xjm, effulgentsia, catch: Rename SafeStringInterface to MarkupInterface and move related classes

Issue #2573139 by rachel_norfolk, joelpittet: Followup: Remove unneeded label class from admin/reports/translations

Issue #2571553 by Jmdrawneek@googlemail.com, Cottser: Followup: Remove unneeded item_list class from locale-translation-update-info.html.twig

Issue #2570355 by Sutharsan, stefan.r, kgoel, josephdpurcell, joelpittet, justAChris, dawehner, pfrenssen, pwolanin, David_Rothstein, catch: Replace remaining !placeholder and @placeholder with :placeholder for URLs

Issue #2571375 by alexpott, webflo, stefan.r, Xano, mr.baileys: Remove TranslationManager dependency from LanguageManager

Issue #2560783 by stefan.r, joelpittet, lauriii, Cottser, Sutharsan, kgoel, justAChris, Gábor Hojtsy, dawehner, jhodgdon, effulgentsia, xjm, andypost, googletorp: Replace !placeholder with :placeholder for URLs in hook_help() implementations

Issue #2570107 by alexpott: Make format_plural() return a PluralTranslatableString object to remove reliance on a static, unpredictable safe list

Issue #2569069 by stefan.r, mr.baileys, alexpott, lauriii: Replace TranslationWrapper with TranslatableString and deprecate TranslationWrapper

Issue #2565123 by joelpittet, lauriii: Move logic from SafeMarkup::format() from template_preprocess_locale_translation_update_info() to template

Issue #2557113 by stefan.r, alexpott, dawehner, joelpittet, cilefen, lauriii, plach, catch, chx, xjm: Make t() return a TranslationWrapper object to remove reliance on a static, unpredictable safe list

Issue #2506445 by joelpittet, Ryan Weal, Sutharsan, alexpott, subhojit777, justAChris, nlisgo, effulgentsia, rpayanm, larowlan, chx, xjm, dawehner, geertvd, lauriii, izus, andypost, borisson_, Sharique: Replace !placeholder with @placeholder in t() and format_string() for non-URLs in tests

Issue #2566447 by stefan.r, joelpittet, alexpott, lauriii, dawehner: Cast safe string objects to string or use assertEqual() in some assertIdentical() comparisons

Issue #2561259 by stefan.r, lauriii, joelpittet, andypost: Cast (optgroup) array keys that may hold translated strings to string

Issue #2564353 by alexpott, joelpittet, xjm, justAChris, nlisgo, subhojit777: Remove !placeholder usage from SafeMarkup::format()

Issue #2473945 by Cottser, rachel_norfolk, axe312, davidhernandez, yannickoo, emma.maria, cilefen, akalata, jaxxed, LewisNyman: Prefix form-item classes with js-

Issue #2560641 by alexpott, lauriii, Xano, borisson_, ianthomas_uk, olli: Remove all usages SafeMarkup::checkPlain() from render arrays

Revert "Issue #2560641 by alexpott, lauriii, Xano, borisson_, ianthomas_uk: Remove all usages SafeMarkup::checkPlain() from render arrays"

This reverts commit 31007609.

Issue #2560641 by alexpott, lauriii, Xano, borisson_, ianthomas_uk: Remove all usages SafeMarkup::checkPlain() from render arrays

Issue #2557519 by alexpott, joelpittet: Remove many usages SafeMarkup::checkPlain() and replace with Html::escape()

Issue #2557253 by phenaproxima, neclimdul: MigrateFullDrupalTestBase test discovery gobbles all the memory

Issue #2550823 by phenaproxima, neclimdul: Migrate Drupal integration tests should load all dump files

Issue #2497585 by mpdonadio, cilefen, borisson_, pjonckiere: Simpletest should set a system timezone in setUp

Issue #2501183 by borisson_, dileepmaurya, Gábor Hojtsy, Berdir: LocaleLookup cache ID is using numeric indexes of the roles field, not role ID's

Issue #2056089 by BarisW, TR, mgifford, rodvolpe, Dom., nambisolo, nod_, katewelling, Manjit.Singh, jhodgdon, Bojhan, Wim Leers: UI problems on the Modules/Extend page

Issue #2493911 by dawehner, larowlan, damiankloip, hussainweb, jibran, cilefen, benjy, iMiksu, mtdowling: Update guzzle, goutte and mink-goutte-driver to the latest release

Issue #2454829 by maxocub, eiriksm, rvilar, Gábor Hojtsy, penyaskito, tstoeckler, Jose Reyero: Configuration translation UI does not support plural sources/targets

Issue #2509300 by dawehner, catch, larowlan: Path alias UI allows node/1 and /node/1 as system path then fatals

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files