* 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.
=== API changes in 1.21 ===
* prop=revisions can now report the contentmodel and contentformat.