title: Trouble on setting the git 'core.editor'
body: <p>I am trying to set git on my <em>Mac Os Snow Leopard 10.6.7</em> but I made some errors on doing that... </p>
  
  <p>At this time I have the following <em>warning</em>:</p>
  
  <pre><code>$ git config --global core.editor
  EDITOR=/usr/bin/vim
  error: More than one value for the key core.editor: mate
  $ git config --global core.editor open
  warning: core.editor has multiple values
  </code></pre>
  
  <p>How can I solve that? And, mostly, how can I set the <code>core.editor</code> to TextEdit and make it works?</p>
  
  <p>P.S.: I already read <a href="https://stackoverflow.com/questions/3539594/is-there-a-way-to-make-textedit-the-default-editor-for-text-files-opened-in-the-t">this question</a>.</p>