Using Quickfix list, how to add a line/string to a certain line number of each file

Question

Scenario: I've got 4 files in my Quickfix list and I want to add a new line, "status": "not started", onto line 5 of each of them.

I tried this:

cfdo norm 5GO"status": "not started",

Which I thought would work on each file, move to line 5, O adds an empty line, and then I'm adding my text. But this doesn't work.

What am I doing wrong, and is there a better way to do this?

Answer 1

Thanks to the commenters there are two decent options here.

Regarding the path I started on, as @D. Ben Knoble intimated, the escaping was important but I used singles around the doubles instead.

I also used 'execute' so I could wrap the whole thing as a string. Not sure if that was needed or not?

So

:cfdo execute 'norm 5GO"status": "not started",' | update

worked, as did @Christian's

:cfdo :call append(4, '"status": "not started"')