JavaScript code snippet Tidy function injects a separating space into the null coalesce operator

Question

For JavaScript snippets, the Tidy feature injects a space between the question marks that compose the nullish coalescing operator ??^[1].

Example:

Prior to Tidy:

console.log(((a, b) => {
  return a ?? b;
})(null, 'b'));

The snippet below with Tidy applied injects a space into the operator which produces a syntax error when run.

console.log(((a, b) => {
  return a ? ? b;
})(null, 'b'));

¹Nullish coalescing operator