* Add deferrable update support for callback/closure.
* Add TitleMove hook before page renames.
* Revision deletion backend code is moved out of SpecialRevisiondelete
-* Add a variable (wgRedactedFunctionArguments) to redact the values sent as certain function
- parameters from exception stack traces.
* Added {{REVISIONSIZE}} variable to get the current size of a revision.
* Add support for the LESS stylesheet language to ResourceLoader. LESS is a
stylesheet language that compiles into CSS. ResourceLoader file modules may
archive.ar_len field.
=== Bug fixes in 1.22 ===
+* (bug 47271) $wgContentHandlerUseDB should be set to false during the upgrade
* Disable Special:PasswordReset when $wgEnableEmail is false. Previously one
could still navigate to the page by entering the URL directly.
* (bug 47138) Fixed a fatal error when a blocked user tries to automatically
to addModules() and made protected.
* Methods WatchAction::doWatch and WatchAction::doUnwatch now return a Status
object instead of a boolean.
+* Information boxes (CSS classes errorbox, warningbox, successbox) have been
+ made more subtle.
+* BREAKING CHANGE: The module 'mediawiki.legacy.IEFixes' has been removed as it was
+ unused. The file skins/common/IEFixes.js remains but is only used by wikibits.
+ The file never contained any re-usable components. To use it in a skin, load
+ 'mediawiki.legacy.wikibits' (which IEFixes depends on) and that will import
+ IEFixes automatically if user agent conditions are met.
+* Code specific to the Math extension was marked as deprecated.
== Compatibility ==