title: How do you deal with Xcode's irritating auto completion behaviour for blocks?
body: <p>XCode's auto completion can sometimes be a pain in the butt, here an example:</p>
  
  <p><img src="https://i.stack.imgur.com/S0XN8.png" alt="enter image description here"></p>
  
  <p>It seems impossible to just type in some content to replace the completionHander placeholder without deleting the entire highlighted section of text - if I hit tab and start typing then Xcode deletes everything highlighted in blue, when what we want to do is keep the ^(NSArray *placemarks, NSError *error) part and type in our own content in place of the completionHandler placeholder.</p>
  
  <p>Are there any tricks to keep auto completion enabled for cases when its useful, but to get this and similar examples usable instead of unusable?</p>