Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  3fff9edec85cecab13a4fdaaa74fc2cf21529728

Set context language in EntityContentDiffViewTest

The test assumes english, so we need to set that.

Tests are otherwise depend on settings and are broken
for non-english wikis.

Change-Id: I623c2924a207aeaec7777e833decf5bf9a17d2b9