title: Difference in the output of git log --decorate: (HEAD -> master) vs (HEAD, master)
body: <p>When I get the log of a GIT repo:</p>
  
  <pre><code>git log --oneline --decorate --graph
  </code></pre>
  
  <p>the output is like this:</p>
  
  <pre><code>* 44025ed (HEAD -&gt; master) second commit
  * adf2dbb first commmit
  </code></pre>
  
  <p>In another repo, when I <code>git log</code>, I get:</p>
  
  <pre><code>* 435b61d (HEAD,master) bar
  * 9773e52 foo
  </code></pre>
  
  <p>What is the difference between <code>(HEAD -&gt; master)</code> and <code>(HEAD,master)</code></p>