title: What does {*} do in TCL?
body: <p>I have used some TCL, but this construction stumps me.</p>
  
  <p>When $res = "Table does not exist", what will the following return?</p>
  
  <pre><code>[list [list {*}$res]]
  </code></pre>
  
  <p>I know what <code>[list [list $res]]</code> would do, but the extra <code>{*}</code> just baffles me.</p>
  
  <p>Thanks for helping.</p>