title: Replace only the first occurence matching a regex with sed
body: <p>I have a string </p>
  
  <pre><code>test:growTest:ret
  </code></pre>
  
  <p>And with sed i would to delete only test: to get :</p>
  
  <pre><code>growTest:ret
  </code></pre>
  
  <p>I tried with</p>
  
  <pre><code>sed '0,/RE/s/^.*://'
  </code></pre>
  
  <p>But it only gives me</p>
  
  <pre><code>ret
  </code></pre>
  
  <p>Any ideas ?</p>
  
  <p>Thanks</p>