Invalid quickfix output for code fix all for infer type from usage

[mhegazy]

TypeScript Version: 2.9.0-dev.201xxxxx

Search Terms:

Code

let x = null;

function foo () {
    if (!x) {  // CodeFix all
        x = 22;
    }
}

function bar() {
    console.log(x);
}

Expected behavior:

let x: number | null = null;

function foo () {
    if (!x) {
        x = 22;
    }
}


function bar() {
    console.log(x);
}

Actual behavior:

let x: number: number: number = null;

function foo () {
    if (!x) {
        x = 22;
    }
}

function bar() {
    console.log(x);
}

Playground Link:

Related Issues:

[ghost]

Fixed the duplicate-change error in #24169; moved the missing null issue to #24168 since it's a separate problem unrelated to fix-all.

[ghost]

Never mind, that one's easy to fix too so did both in #24169.