ExclamationToken is not stripped from PropertyDeclaration emit with useDefineForClassFields

[ajafff]

TypeScript Version: 3.7.2

Search Terms:

Code

// @target: esnext
// @useDefineForClassFields: true
class C {
    p!;
}

Expected behavior:

"use strict";
class C {
    p;
}

Actual behavior:

"use strict";
class C {
    p!;
}

Playground Link: http://www.typescriptlang.org/play/?useDefineForClassFields=true&target=99#code/MYGwhgzhAEDC0G8BQ1XQA4EIDcSC+QA

Related Issues: #35095

[ajafff]

Turns out this is not an issue because a definite assignment assertion on properties is only allowed with a type annotation (and that case is already handled correctly).