><span class="va">p2</span><span class="op">)</span> <span class="op">|&gt;</span> <span class="fu">pipe_append</span><span class="op">(</span><span class="va">p3</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>           step depends    out keepOut  group  state</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>         &lt;char&gt;  &lt;list&gt; &lt;list&gt;  &lt;lgcl&gt; &lt;char&gt; &lt;char&gt;</span>
<span class="r-out co"><span class="r-p