Steamroller Array.prototype.flat() error

Hi everyone,
After copying the results for many many challenges I finally finished one by my self :sweat_smile: :joy:, but the test says I used Array.prototype.flat()
I didn’t use it.

My Code
Warning You May Lose Brain Cells

function steamrollArray(arr) {
  let flat = [];
  for(let i = 0; i < arr.length; i++){
  function isArr (item) {
        for(let j = 0; j < item.length; j++){
      } else {
  return flat;

Renaming array flat to something not including “flat” in it, should make problem go away. Test is checking just for the word “flat” in the code.

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There was a changed to the regex which I believe has caused this issue.

Edit: The PR

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