title: How to format function definition with arguments on multiple lines?
body: <p>I'd like to put arguments on different lines, but I get parse errors on all the variations I try, including adding commas, allwin-style parens, and different indentations.</p>
  
  <pre><code>  constructor: (
      @a
      @b
      @c
    ) -&gt;
  </code></pre>