title: What is this unicode invisible character?
body: <p>While trying to parse some unicode text strings, I'm hitting an invisible character that I can't find any definition for. If I paste it in to a text editor and show invisibles, I can see that it looks like a bullet point (• alt-8), and by copy/pasting them, I can see it has an effect like a space or tab, but it's none of those.</p>
  
  <p>I need to test for it, something like...</p>
  
  <pre><code> if(uniChar == L'\t') 
  </code></pre>
  
  <p>But of course I need to provide something to match to.</p>
  
  <p>It has bytes 0xc2 0xa0 in UTF-8.</p>
  
  <p>If no-one has a definition, is there any devious way to test for something I can't define!?</p>
  
  <p>(I happen to be using NSStrings in Objective-C, OSX, Xcode, but I don't think that has any bearing.)</p>