JQMIGRATE: $(html) HTML strings must start with '<' character

• jquery.uls.core.js :88

https://github.com/wikimedia/mediawiki-extensions-UniversalLanguageSelector/blob/fb41b2/lib/jquery.uls/src/jquery.uls.core.js#L88

this.$menu = $( template );

If it contains text (e.g. "Hello world"), then you have to use $.fn.html() or $.parseHTML instead due to ambiguity with a css selector.

If it contains leading whitespace or '#', then $() no longer allows this for consistency and security reasons, and also, use $.parseHTML(), or fix the string to not have leading whitespace.

I think in case of ULS you just need to make sure that leading new line is gone.

Version: unspecified
Severity: normal