title: How to draw(edit) an ascii git tree
body: <p>How the git tree shown in the git documentation like the one below</p>
  
  <pre><code>       G   H   I   J
          \ /     \ /
           D   E   F
            \  |  / \
             \ | /   |
              \|/    |
               B     C
                \   /
                 \ /
                  A
  </code></pre>
  
  <p>is drawn(edited). Is there a specific tool to do it. I have looked at the <a href="http://www.asciiflow.com/" rel="noreferrer">http://www.asciiflow.com/</a> which is not very helpful for this purpose.</p>