title: Replace single quotes with double quotes in Bash
body: <p>I have a directory full of SAS label files. </p>
  
  <p>The label files have space, single quote, space, single quote in each file:</p>
  
  <pre><code>VAR1 = ' 'SOME LABEL' ' 
  </code></pre>
  
  <p>I want a bash script that will replace these single quotes with double quotes so that I end up with:</p>
  
  <pre><code>VAR1 = "SOME LABEL"
  </code></pre>
  
  <p>How can I do this?</p>