Isolated declarations quick fix explicitly prints out default type arguments

[DanielRosenwasser]

// @declaration: true
// @isolatedDeclarations: true

export interface Foo<T, U = T[]> {
}

export function /**/foo(x: Foo<string>) {
    return x;
}

Request a quick fix at /**/.

Current:

Add return type 'Foo<string, string[]>'.

Expected:

Add return type 'Foo<string>'.