set $wgTidyConfig to null and also set $wgUseTidy to true.
* $wgLogAutopatrol now defaults to false instead of true.
* $wgValidateAllHtml was removed and will be ignored.
+* $wgScriptExtension was removed (deprecated and ignored since 1.25).
+ See 1.25 release notes for more information.
=== New features in 1.31 ===
* (T76554) User sub-pages named ….json are now protected in the same way that ….js