title: Xcode - Invalid character in source file (Replace " " with " ")
body: <p>I have a question about Xcode (Swift). Sometimes when I write an if statement. Something like this:</p>
  <pre><code>if(a == 2){
  //do Sth
  } else {
  //do Sth
  }
  </code></pre>
  <p>Xcode throws me an error: &quot;Invalid character in source file&quot;
  I know it is no big deal and fixed by clicking on &quot;Fix-it&quot; but I want
  to know what is the problem. That doesn't make sense to me...</p>
  <p><a href="https://i.stack.imgur.com/VfQrU.png" rel="noreferrer"><img src="https://i.stack.imgur.com/VfQrU.png" alt="Error" /></a></p>
  <p>My Xcode is on 7.2 and I am using Swift - I don't know if this is just a Swift problem.</p>