an><span style="color:#a6e22e">Formatter</span><span style="color:#f92672">[</span><span style="color:#66d9ef">Int</span><span style="color:#f92672">]</span> <span style="color:#66d9ef">:</span>
  <span style="color:#66d9ef">def</span> <span style="color:#66d9ef">format</span><span style="color:#f92672">(</span><span style="color:#66d9ef">a:</span> <span style="color:#66d9ef">Int</span><span style="color:#f92672">)</span><span style="color:#66d9ef">:</span> <span style="color:#66d9ef">String</span> <span st