title: In Vim, why can't I remap keys to `w`?
body: <p>In my <code>.vimrc</code>:</p>
  
  <pre><code>noremap z w
  </code></pre>
  
  <p>When I examine the mappings, <code>:map z</code> shows only:</p>
  
  <pre><code>z         * w
  </code></pre>
  
  <p>When I press <code>z</code>, my cursor moves as expected (to the next word). However, when I try to use something like <code>diz</code> or <code>ciz</code>, nothing happens. At the bottom of my screen, <code>di</code> and<code>ci</code> appear as I'm typing them, but once I type <code>z</code>, Vim gleefully sits idle. <code>diw</code> and <code>ciw</code> still work as expected.</p>
  
  <p>What else do I need to do? Is there a mapping mode I don't know about?</p>