Array.prototype.sort make compareFn required in lib.d.ts

This is a suggestion to change the signature declaration of Array sort in lib.d.ts from

sort(compareFn?: (a: T, b: T) => number): this;

to

sort(this: string[], compareFn?: (a: string, b: string) => number): this;
sort(compareFn: (a: T, b: T) => number): this;

i.e. make compareFn non-optional for non-string arrays. This would result in errors in cases such as

[2, 10].sort() // returns [10, 2], i.e. sorted lexicographically, which is very unintuitive.

While this is strictly speaking a breaking change, it wouldn't be the first time the typings are stricter than the actually definitions.

Lies die Deklarationen von Array.prototype.sort in lib.d.ts und vergleiche sie mit den vorgeschlagenen Überladungen. Als erledigt gilt, dass Arrays, die keine Strings enthalten, compareFn erfordern, während String-Arrays weiterhin ein optionales compareFn zulassen; prüfe das Beispiel [2, 10].sort() anhand des resultierenden Typverhaltens.