title: "@@" in patch/diff (linux)?
body: <p>I'm really new to linux patches and diff.  I'm trying to edit a patch and there's some errors and I have to fix them.</p>
  
  <p>I've come across:
  @@ -11,7 +11,6 @@</p>
  
  <p>many times in the patch (diff) file and I think the first set of numbers represent the starting line number and number of lines to be edited, but what does the second set represent?</p>