* Added 'HistoryRevisionTools' and 'DiffRevisionTools' hooks.
* (bug 33186) Add image rotation api "imagerotate"
* (bug 34040) Add "User rights management" link on user page toolbox.
+* (bug 45526) Add QUnit assertion helper "QUnit.assert.htmlEqual" for asserting
+ structual equality of HTML (ignoring insignificant differences like
+ quotmarks, order and whitespace in the attribute list).
=== Bug fixes in 1.21 ===
* (bug 40353) SpecialDoubleRedirect should support interwiki redirects.
* (bug 42430) Calling numRows on MySQL no longer propagates unrelated errors.
* (bug 44719) Removed mention of non-existing maintenance/migrateCurStubs.php
script in includes/DefaultSettings.php
+* (bug 45143) jquery.badge: Treat non-Latin variants of zero as zero as well.
+* (bug 46151) mwdocgen.php should not ignore exit code of doxygen command.
+* (bug 41889) Fix $.tablesorter rowspan exploding for complex cases.
=== API changes in 1.21 ===
* prop=revisions can now report the contentmodel and contentformat.
* South Azerbaijani (azb) added.
* (bug 30040) Autonym for nds-nl is now 'Nedersaksies' (was 'Nedersaksisch').
+* (bug 45436) Autonym for pi (Pali) is now 'पालि' (was ''पाळि').
* (bug 34977) Now formatted numbers in Spanish use space as separator
for thousands, as mandated by the Real Academia Española.
* (bug 35031) Kurdish formatted numbers now use period and comma