title: Regular expression search during Vim replace
body: <p>I have many lines in my script that look like:</p>
  
  <pre class="lang-bsh prettyprint-override"><code>./run -f abc.txt
  ./run -f abc1.txt
  ./run -f abc2.txt
  ..
  ..
  ./run -f abc50.txt
  </code></pre>
  
  <p>I need to replace all <code>abc*.txt</code> with <code>abc.txt</code>. Is there a way in Vim I can do this, where I search for all <code>abc*.txt</code> and replace them?</p>