title: Find/Replace using grep and Textwrangler
body: <p>I'm using <code>grep</code> on TextWrangler to find strings of this type:</p>
  
  <pre><code>4,600.00
  </code></pre>
  
  <p>My regex command is the following:</p>
  
  <pre><code>\d.\d{3}.\d{2}
  </code></pre>
  
  <p>which seems to find the strings correctly. I would like to replace the string <code>4,600.00</code> with <code>4600.00</code> as I wish to save the data in a <code>.csv</code> file. How do I remove the comma from each number that I find?</p>