Check `toLocaleString()` methods for locale leaks
There are some new objects with toLocaleString()
(TypedArray
(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/toLocaleString), Array
(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/toLocaleString)) which should according to the docs use all the same algorithm as the one in Number
.
We should make sure that no locale is leaked and probably write a test for that.