title: How can I have grep not print out 'No such file or directory' errors?
body: <p>I'm grepping through a large pile of code managed by git, and whenever I do a grep, I see piles and piles of messages of the form: </p>
  
  <pre><code>&gt; grep pattern * -R -n
  whatever/.git/svn: No such file or directory
  </code></pre>
  
  <p>Is there any way I can make those lines go away? </p>