=== Bug fixes in 1.27 ===
* Special:Upload will now display correct maximum allowed file size when running
under HHVM (T116347).
+* (T54077) The APIEditBeforeSave hook will once again give only the content of
+ the section being edited, rather than the whole revision. This reverts the
+ change made in MediaWiki 1.22.
=== Action API changes in 1.27 ===
* Added list=allrevisions.