662d6f93b0156bdaab67f74dfd5fecf4ed739f01 added a GRAMMAR usage to guidedtour-tour-firsteditve-edit-page-description (among others). Using {{ had the side effect of causing jQueryMsg to start parsing it, instead of mediawiki.js's bare-bones message parser. jQueryMsg apparently does not handle HTML entities.
Version: master
Severity: normal