title: How to disable bracket balancing in Xcode9
body: <p>When I hit delete-key to remove the single ']' character like this in Xcode 9.0 (9A235),</p>
  
  <pre><code>id object = [] ;
                ^
                |
                caret position
  </code></pre>
  
  <p>Xcode deletes TWO characters automatically.</p>
  
  <pre><code>id object =  ;
              ^
              |
              caret position
  </code></pre>
  
  <p>I know this behavior is implemented for convenience. BUT I don't like this. I can't find options in preferences window. please teach me how to disable this behavior.</p>