title: Prettier: Add space between function and parenthesis
body: <p>In VSCode, each time I save a JS file, <strong>Prettier</strong> removes the space between the function keyword and its parenthesis.</p>
  
  <p>It changes this:</p>
  
  <pre><code>function (parameter)
  </code></pre>
  
  <p>To this:</p>
  
  <pre><code>function(parameter)
  </code></pre>
  
  <p>But I want to keep the space.</p>
  
  <p>Some people are suggesting adding this rule to VSCode setting:</p>
  
  <pre><code>"prettier.spaceBeforeFunctionParen": true
  </code></pre>
  
  <p>But apparently this rule doesn't exist any more.</p>
  
  <p>How can I force a space between function and parenthesis in Prettier?</p>