title: git merge prompt "fatal: empty ident"
body: <p>when I want to merge change from the "cl" branch using git, I typed:</p>
  
  <pre><code>git merge "merge" HEAD cl
  </code></pre>
  
  <p>I got the following anwser:</p>
  
  <blockquote>
    <p><em>*</em> Please tell me who you are.</p>
    
    <p>Run</p>
    
    <p>git config --global user.email "you@example.com"<br>
      git config --global user.name "Your Name"</p>
    
    <p>to set your account's default identity. Omit --global to set the
    identity only in this repository.</p>
    
    <p>fatal: empty ident   not allowed</p>
  </blockquote>
  
  <p>So, I typed:</p>
  
  <pre><code>git config  chandler.chen "chen lei"
  </code></pre>
  
  <p>however, after config the account information, merge still get the former result.</p>