uz, vi.
* Added 'CategoryAfterPageAdded' and 'CategoryAfterPageRemoved' hooks.
* Added 'HistoryRevisionTools' and 'DiffRevisionTools' hooks.
+* Added 'SpecialSearchResultsPrepend' and 'SpecialSearchResultsAppend' 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 23393) HTML <hN> headings containing line breaks are now handled
+ correctly.
+* (bug 45803) Whitespace within == Headline == syntax and within <hN> headings
+ is now non-significant and not preserved in the HTML output.
=== Bug fixes in 1.21 ===
* (bug 40353) SpecialDoubleRedirect should support interwiki redirects.
* (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.
+* WDDX formatted output will actually be formatted (and normal output will no
+ longer be), and will no longer choke on booleans.
=== API changes in 1.21 ===
* prop=revisions can now report the contentmodel and contentformat.