title: How do you "debug" a regular expression with sed?
body: <p>I'm trying to use a regexp using <code>sed</code>. I've tested my regex with kiki, a gnome application to test regexpd, and it works in kiki.</p>
  
  <pre><code>date: 2010-10-29 14:46:33 -0200;  author: 00000000000;  state: Exp;  lines: +5 -2;  commitid: bvEcb00aPyqal6Uu;
  </code></pre>
  
  <p>I want to replace <code>author: 00000000000;</code> with nothing. So, I created the regexp, that works when I test it in kiki:</p>
  
  <pre><code>author:\s[0-9]{11};
  </code></pre>
  
  <p>But doesn't work when I test it in <code>sed</code>.</p>
  
  <pre><code>sed -i "s/author:\s[0-9]{11};//g" /tmp/test_regex.txt
  </code></pre>
  
  <p>I know regex have different implementations, and this could be the issue. My question is: how do I at least try do "debug" what's happening with sed? Why is it not working?</p>