title: What does "@@ -1 +1 @@" mean in Git's diff output?
body: <p>I've been collecting data from the information returned from</p>
  
  <pre><code>git diff &lt;commitId&gt;..&lt;commitId&gt;
  </code></pre>
  
  <p>and I ran into <code>@@ -1 +1 @@</code></p>
  
  <p>I can't figure out what that's telling me. I've searched a bit on Google but to no avail.</p>