title: Unable to undo removal in Zsh
body: <p>I run at path/test</p>
  
  <pre><code>rm -r *
  </code></pre>
  
  <p>The <a href="http://www.ee.ryerson.ca/guides/zsh-intro.pdf" rel="nofollow noreferrer">tutorial</a> says that I can undo the change by</p>
  
  <blockquote>
    <p>If one of these fancyeditor commands
    changes your command line in a way you
    did not intend, you can  undo changes
    withˆ_,ifyou can get it out of your
    keyboard, orˆXˆU,otherwise.</p>
  </blockquote>
  
  <p>However, I did not get the files back by pressing Ctrl-x Ctrl-u or Ctrl-x-u. 
  I also tried ^_ unsuccessfully by pressing Shift-6 Shift-- or Shift-6--.</p>
  
  <p><strong>How can you undo the removal in Zsh?</strong></p>