'Add missing function decoration' quick fix can duplicate //@ts-check comment

[mjbvz]

Bug Report

🔎 Search Terms

• ts check
• quick fix
• code action

🕗 Version & Regression Information

4.3.0-dev.20210228

💻 Code

For the javascript:

//@ts-check

add(1, 2);

Use add missing function declaration on add

🙁 Actual behavior

The ts check comment is duplicated

//@ts-check

add(1, 2);
function //@ts-check
    add(arg0, arg1) {
        throw new Error("Function not implemented.");
}

🙂 Expected behavior

//@ts-check

add(1, 2);
function add(arg0, arg1) {
        throw new Error("Function not implemented.");
}