Where is the mistake? Why doesn't the same script work after copying?

Question

JavaScript

The same script, with minor changes. I’ve been comparing them line by line with a magnifying glass for half an hour and I just can’t understand why one works and the other doesn’t ?? Some kind of madness ...
Working script:

page.open(url, function(status) {
  console.log('Status: ' + status);
  // Do other things here...
  var bestList = page.evaluate(function() {

    var bestElements = document.querySelectorAll(
      '#featured-books-inner .book-block-title'
    );

    var bestData = [];

    for(var i = 0; i < bestElements.length; i++) {
      bestData.push(bestElements[i].innerHTML.trim());
    }

    return bestData;
  });

  console.log('-----------------------------------');
  for (var j = 0; j < bestList.length; j++) {
    console.log((j + 1) + ' | ' + bestList[ j ]);
  };

  phantom.exit();
});

Non-working script:

page.open(url, function(status) {
  console.log('Status: ' + status);
  // Do other things here...
  var bestList = page.evaluate(function() {

    var bestElements = document.querySelectorAll(
      '#featured-books-inner .book-block-title'
    );

    var bestData = [];

    for(var i = 0; i < bestElements.length; i++) {
      bestData.push(bestElements[i].innerHTML.trim());
    }

    return bestData;
  });
  // log results
  console.log('-----------------------------------');
  for (var j = 0; j < bestList.length; j++) {
    console.log((j + 1) + ' | ' + bestList[ j ]);
  };
  // exit
  phantom.exit();
)}

WHERE IS THE ERROR???
And how conveniently and quickly to compare code in similar situations? Is there some solution like diff on Github, but convenient and fast? Yuzayu Atom.

Answer 1

No, well, it's full of tryndets. I found an error.")}" instead of "})"
And now the question is - HOW TO AVOID THIS?
Do you need to be covered with a bunch of tests in which to drown for several months just to quickly find bugs with brackets?
I'm shocked)))

Answer 2

Did you try to debug?)